还剩52页未读，
继续阅读
高中Unit 2 The Olympic Games复习ppt课件
展开
这是一份高中Unit 2 The Olympic Games复习ppt课件，共60页。
Ⅰ. 同义句转换1. He knws English very well. =He _____ _____ _____ _____ _____ English. =He is _____ _____ English. =His English is _____ . 答案：has a gd knwledge f; gd at; perfect/excellent
2. I prefer swimming t skating. =I _____ _____ swim rather than skate. =I like swimming _____ than skating. 答案：prefer t; mre
3. He had n sner left hme than it began t rain. = _____ _____ had he left hme _____ it began t rain. =He had _____ left hme _____ it began t rain. = _____ _____ he left hme, it began t rain. 答案： N sner, than; hardly, when; The mment
4. The prblem is t difficult fr me t slve. =That prblem is _____ difficult _____ I can’t slve it. =That prblem is _____ my ability. =It is such a difficult prblem _____ I can’t slve. 答案： s, that; beynd; as
5. I didn’t knw abut it until he tld me yesterday. =Nt until he tld me yesterday _____ I knw abut it. =It was _____ _____ he tld me yesterday _____ I knew abut it. 答案： did; nt until, that
Ⅱ. 在不改变句意的情况下，改写下列句子，使其更加简洁凝练1. There are ver fifty students in this schl wh are ging t take part in the sprts meet which is planned fr next Sunday.____________________________________________________ 答案： Over fifty students in this schl are ging t take part in the sprts meet next Sunday.
2. Because f the fact that I had a lt f wrk t d, it wasn’t pssible fr me t accept their invitatin. __________________________________________________答案： I was t busy t accept their invitatin.
3. The prblem f pllutin is serius in ur city, but if we try ur best t stp the pllutin, the pllutin will stp. ___________________________________________________4. He tld us a stry; the stry was very interesting. ___________________________________________________答案： 3. The prblem f pllutin is serius in ur city, but if we try ur best, the pllutin will stp. 4. He tld us a very interesting stry.
5. Eugene O’Neill, was an American writer, and he had an unhappy childhd, and he tld the stry f his childhd in a play named A Lng Day’s Jurney Int Night and he said it was written in tears and bld. _________________________________________________答案： Eugene O’Neill, an American writer, tld the stry f his unhappy childhd in a play named A Lng Day’s Jurney Int Night, which he said was written in tears and bld.
1. The little by wn’t g t sleep ______ his mther tells him a stry. ［2010全国卷Ⅰ，30］A. r B. unless C. but D. whether【解析】选B。句意：除非他妈妈给他讲一个故事，否则这个小男孩就不去睡觉。r意为“或者”，表示选择；unless意为“除非”，表示条件；but意为“但是”，表示转折；whether意为“是否”。根据句意可知，答案选B。
2. The engineers are s busy that they have zer time fr utdr sprts activities, _____ they have the interest. ［2010安徽，29］A. whereverB. wheneverC. even ifD. as if
【解析】选C。句意：这些工程师们是如此忙以至于没有时间参加户外的体育活动，即使他们有这样的兴趣。根据句意应用even if，意为“即使”，引导让步状语从句； wherever “无论在哪里”，引导地点状语从句；whenever “无论什么时候”，引导时间状语从句；as if “好像，仿佛”，引导方式状语从句。
3. ____ they decide which cllege t g t, students shuld research the admissin prcedures. ［2010北京，30］A. AsB. WhileC. UntilD. Once
【解析】选D。句意：学生们一旦决定了上哪一所大学，就应该研究入学程序。nce“一旦”，表条件；as 作连词用时，可表时间、原因等，意思是 “随着；因为”；while 可表时间、对比或让步，意思是“当……时候；而……；尽管”；until 表时间，意思是“直到……”。根据句意可知，答案选D。
4. Tim is in gd shape physically_____he desn’t get much exercise. ［2010湖南，32］A. ifB. even thughC. unlessD. as lng as【解析】选B。从语境来看，前后存在让步关系，故用even thugh。句意：尽管Tim没做太多的锻炼，但他的体能状态却非常好。
5. —Our hliday cst a lt f mney. —Did it? Well, that desn’t matter _____ yu enjyed yurselves. ［2010江西，22］A. as lng asB. unlessC. as sn asD. thugh【解析】选A。句意：——我们的假期花了很多钱。——是吗？不过没关系，只要你们玩得高兴就行。as lng as 只要……； unless 除非； as sn as 一……就……； thugh 尽管。根据句意可知，答案选A。
6. The ld man asked Lucy t mve t anther chair ______ he wanted t sit next t his wife. ［2010辽宁，29］A. althughB. unlessC. becauseD. if
【解析】选C。句意：这位老人请露西移到另一把椅子上，因为他想跟他妻子挨着坐。空格前后两个句子在逻辑意义上存在因果关系，所以用because引导原因状语从句，答案选C。 althugh引导让步状语从句，unless和if引导条件状语从句，均与题意不符。
7. The schl rules state that n child shall be allwed ut f the schl during the day, ______ accmpanied by an adult. ［2010山东，28］A. nce B. when C. if D. unless【解析】选D。句意：学校制度规定，除非有成年人陪伴，否则任何孩子都不允许在校期间出学校。根据句意和句子结构分析，用连接词unless，意为“除非”，引导条件状语从句。 accmpanied by an adult为省略形式，相当于unless he/she is accmpanied by an adult。
8. _____ ur manager bjects t Tm’s jining the club, we shall accept him as a member. ［2010上海，39］A. Until B. Unless C. If D. After【解析】选B。句意：如果我们的经理不反对汤姆加入俱乐部，我们将接受他成为我们中的一员。unless引导条件状语从句，意义等同于if. . . nt，意为“除非，如果不”。
9. Accrding t statistics, a man is mre than twice as likely t die f skin cancer _____ a wman. ［2009江西，24］A. thanB. suchC. sD. as【解析】选D。考查比较状语从句。句意为：据统计，男性死于皮肤癌的几率是女性的两倍多。本句的核心结构为：a man is. . . twice as likely t die f. . . cancer as. . . ，本题mre than修饰twice。
10. —I wnder hw much yu charge fr yur services. —The first tw are free _____ the third csts $30. ［2009安徽，22］A. whileB. untilC. whenD. befre【解析】选A。句意为：——我想知道你要收多少服务费。——前两次是免费的，而第三次的费用是30美元。while而，然而, 表前后对比；until直到；when当……的时候，这时；befre之前，……才……。
1. We have built a new hspital _____ there used t be a garden. ［2011北京模拟］A. in which B. what C. when D. where【解析】选D。句意：我们在以前是个花园的地方新建了一所医院。where引导地点状语从句，表示医院建立的地点。
2. _____ , I have t put it away and fcus my attentin n study this week. A. Hwever the stry is amusingB. N matter amusing the stry isC. Hwever amusing the stry isD. N matter hw the stry is amusing
【解析】选C。考查状语从句。句意：无论这个故事多么有趣，本周我都不得不先把它放到一边，集中精力于我的学习。该句为Hwever引导的让步状语从句，相当于“N matter hw amusing the stry is”。
3. _____ I’m willing t help, I d nt have much time available. A. WhileB. WhenC. OnceD. Since【解析】选A。考查while的用法。句意为：尽管我愿意帮忙，但是我没有太多的空闲时间。while在此处引导让步状语从句，相当于althugh。
4. _____ many Chinese wmen have received higher educatin, there are still bstacles that prevent them frm enjying the same pprtunities fr educatin and emplyment as men. A. WhetherB. BecauseC. WhenD. Althugh【解析】选D。句意：虽然一些中国妇女已接受了较高教育，但依然有许多障碍使她们不能享受与男士一样的受教育与就业的机会。由句意可知用althugh“虽然，尽管”引导让步状语从句。
5. Always put yurself in ther’s shes. _____ yu feel that it hurts yu, it prbably hurts the persn t. A. IfB. UnlessC. UntilD. Thugh【解析】选A。考查状语从句。根据句意“要经常站在别人的立场上（思考问题），如果你觉得它伤害了你，它也可能会伤及别人”，可知，此处表示条件，意为“如果”，故选A项。
6. Yu shuld try t get a gd night’s sleep _____ much wrk yu have t d. ［2011锦州模拟］A. whateverB. n matterC. althughD. hwever
【解析】选D。句意：无论你必须做多少工作，你都应该好好睡一觉。whatever引导让步状语从句，其后常加名词，而当名词前有much修饰时，whatever必须换成hwever; n matter不能单独引导让步状语从句，althugh引导让步状语从句时，句子需用正常语序。故用hwever。
7. _____ , his idea was accepted by all the peple at the meeting. A. Strange as might it sundB. As it might sund strangeC. As strange it might sundD. Strange as it might sund【解析】选D。考查状语从句。as引导的让步状语从句应用倒装语序。句型为：adj. /adv. /n. （一般不带冠词）/v. (原形)+as+主语+谓语，故D项正确。
8. If yu want t d the jb nce mre, yu’d better be mre careful _____ yu make mistakes. ［2011皖南八校模拟］A. whereB. in caseC. s thatD. when【解析】选B。后句句意：你最好认真点，以免犯错。in case引导目的状语，意为“一旦；以免”。与句意相符。
9. Hw lng d yu think it will be _____ the cmputer cmpany puts frward a new prduct? A. befreB. sinceC. untilD. that【解析】选A。句意：你认为还有多久这家计算机公司才能推出一项新产品？It will be / is / was / has been +一段时间+ befre “还有多久才能……”。
10. _____ mst children nwadays are the nly children, they tend t be mre self-centered. ［2011温州模拟］A. Ever sinceB. Nw thatC. Only ifD. Even thugh【解析】选B。句意为：由于现在大多数孩子是独生子女，他们往往会更加以自我为中心。nw that引导原因状语从句，意为“由于，因为”。
11. _____ it is hped that cllege students shuld be equipped with the ability t take a gd set f ntes, this is nt always the case. ［2011南昌模拟］A. When B. While C. As D. Unless【解析】选B。while放在句首引导让步状语从句，意为“尽管，虽然”。句意为：尽管大家期望大学生应具备会做笔记的能力，但事实并非总是如此。
12. Many f them turned a deaf ear t his advice, _____ they knew it t be valuable. A. as ifB. nw thatC. even thughD. s that【解析】选C。句意为：很多人对他的建议置若罔闻，尽管他们知道他的建议很有价值。even thugh引导让步状语从句，意为“尽管，虽然”，符合句意。as if似乎，好像；nw that既然，由于；s that以便，因此。
13. These examples shw that all individuals, _____ they are rich r pr, shuld be respnsible _____ they are invlved in law. A. if; whenB. if; as lng asC. whether; as lng asD. whether; since【解析】选C。句意：这些例子说明所有的人，无论穷富，只要触犯了法律，就应当承担责任。if和whether可互换，但有选择项时用whether; when表时间；since表原因或时间；as lng as表条件，意为只要。故选C。
14. I thught him handsme and hnest _____ I met him. A. the first timeB. fr the first timeC. every time whenD. by the time【解析】选A。句意：我一见到他，我就认为他既英俊又诚实。the first time, every time等表时间的名词短语可直接引导时间状语从句或在其后加that; fr the first time只能作状语，by the time常与完成时连用，故选A。
15. The travelers encuraged each ther t g n _____ difficulties they met. A. hweverB. whateverC. n matterD. althugh【解析】选B。考查状语从句。句意为：无论遇到什么困难，旅游者都彼此鼓励继续前行。whatever无论什么，符合句意。hwever无论如何；althugh尽管；n matter需加what才正确。
16. _____ mst wlves rely n their grups fr fd, shelter and cmpaninship, they have develped a system f signals t keep the grups tgether. A. BecauseB. AlthughC. UnlessD. Where【解析】选A。考查原因状语从句。由句意可知前后为因果关系，故用because。althugh尽管；unless除非，分别引导让步状语从句和条件状语从句，而where引导地点状语从句。
17. _____ many measures have been taken by the gvernment, sme fd pisning events are still happening. A. Unless B. If C. As D. Thugh【解析】选D。考查状语从句。句意为：尽管政府已经采取了许多措施，一些食物中毒事件仍时有发生。thugh引导让步状语从句。
18. We must take measures t prtect endangered wildlife _____ it is t late. ［2011太原模拟］A. as lng asB. whenC. befreD. until【解析】选C。befre it is t late“趁还不是太晚”；as lng as“只要”；until“直到”。
19. The landslide almst flattened the small twn f Zhuqu, leaving 1, 248 dead and 496 missing. I wnder hw lng it will be _____ the peple there get ver the shck. A. befreB. whenC. sinceD. after
【解析】选A。考查状语从句。句意为：那次泥石流几乎夷平了舟曲小城，造成1 248人死亡，496人失踪。我在想，要多久人们才可以从这场灾难带来的震惊中恢复过来。本句使用了It will be+一段时间+befre句型，其中befre意为“直到……才”。
20. An advertisement is useful in _____ it can persuade custmers t buy the kinds f gds in the shp. A. that B. which C. what D. whether【解析】选A。句意为：由于广告能说服人们购买商店的商品所以有用。in that由于，引导原因状语从句。
(21~24题为教师用书独具)21. Yu can never expect t learn smething _____ yu study hard. ［2011合肥模拟］A. unless B. after C. if D. when【解析】选A。句意：除非你努力学习，否则很难学到东西。由句意可知用unless “除非”。
22. —The current internatinal financial crisis is affecting mst cuntries in the wrld. —Wuld it be at least several years _____ everything returns t nrmal? ［2011银川模拟］A. when B. that C. since D. befre【解析】选D。考查连词辨析。句意为：——当前的国际经济危机正在影响世界上大多数国家。——至少要过几年一切才会恢复正常吗？It wuld be +一段时间+befre从句表示“要过多久才……”，符合句意。
23. —They suggest the number f cars shuld be limited t stp air pllutin. —_____ , the idea is nt very practical. A. Sunds gd as itB. As it sunds gdC. As gd it sundsD. Gd as it sunds【解析】选D。考查as引导让步状语从句。句型为：adj. /adv. /n. (一般不带冠词)/v. (原形)+as+主语+谓语，故本题选D。
Ⅰ. 同义句转换1. He knws English very well. =He _____ _____ _____ _____ _____ English. =He is _____ _____ English. =His English is _____ . 答案：has a gd knwledge f; gd at; perfect/excellent
2. I prefer swimming t skating. =I _____ _____ swim rather than skate. =I like swimming _____ than skating. 答案：prefer t; mre
3. He had n sner left hme than it began t rain. = _____ _____ had he left hme _____ it began t rain. =He had _____ left hme _____ it began t rain. = _____ _____ he left hme, it began t rain. 答案： N sner, than; hardly, when; The mment
4. The prblem is t difficult fr me t slve. =That prblem is _____ difficult _____ I can’t slve it. =That prblem is _____ my ability. =It is such a difficult prblem _____ I can’t slve. 答案： s, that; beynd; as
5. I didn’t knw abut it until he tld me yesterday. =Nt until he tld me yesterday _____ I knw abut it. =It was _____ _____ he tld me yesterday _____ I knew abut it. 答案： did; nt until, that
Ⅱ. 在不改变句意的情况下，改写下列句子，使其更加简洁凝练1. There are ver fifty students in this schl wh are ging t take part in the sprts meet which is planned fr next Sunday.____________________________________________________ 答案： Over fifty students in this schl are ging t take part in the sprts meet next Sunday.
2. Because f the fact that I had a lt f wrk t d, it wasn’t pssible fr me t accept their invitatin. __________________________________________________答案： I was t busy t accept their invitatin.
3. The prblem f pllutin is serius in ur city, but if we try ur best t stp the pllutin, the pllutin will stp. ___________________________________________________4. He tld us a stry; the stry was very interesting. ___________________________________________________答案： 3. The prblem f pllutin is serius in ur city, but if we try ur best, the pllutin will stp. 4. He tld us a very interesting stry.
5. Eugene O’Neill, was an American writer, and he had an unhappy childhd, and he tld the stry f his childhd in a play named A Lng Day’s Jurney Int Night and he said it was written in tears and bld. _________________________________________________答案： Eugene O’Neill, an American writer, tld the stry f his unhappy childhd in a play named A Lng Day’s Jurney Int Night, which he said was written in tears and bld.
1. The little by wn’t g t sleep ______ his mther tells him a stry. ［2010全国卷Ⅰ，30］A. r B. unless C. but D. whether【解析】选B。句意：除非他妈妈给他讲一个故事，否则这个小男孩就不去睡觉。r意为“或者”，表示选择；unless意为“除非”，表示条件；but意为“但是”，表示转折；whether意为“是否”。根据句意可知，答案选B。
2. The engineers are s busy that they have zer time fr utdr sprts activities, _____ they have the interest. ［2010安徽，29］A. whereverB. wheneverC. even ifD. as if
【解析】选C。句意：这些工程师们是如此忙以至于没有时间参加户外的体育活动，即使他们有这样的兴趣。根据句意应用even if，意为“即使”，引导让步状语从句； wherever “无论在哪里”，引导地点状语从句；whenever “无论什么时候”，引导时间状语从句；as if “好像，仿佛”，引导方式状语从句。
3. ____ they decide which cllege t g t, students shuld research the admissin prcedures. ［2010北京，30］A. AsB. WhileC. UntilD. Once
【解析】选D。句意：学生们一旦决定了上哪一所大学，就应该研究入学程序。nce“一旦”，表条件；as 作连词用时，可表时间、原因等，意思是 “随着；因为”；while 可表时间、对比或让步，意思是“当……时候；而……；尽管”；until 表时间，意思是“直到……”。根据句意可知，答案选D。
4. Tim is in gd shape physically_____he desn’t get much exercise. ［2010湖南，32］A. ifB. even thughC. unlessD. as lng as【解析】选B。从语境来看，前后存在让步关系，故用even thugh。句意：尽管Tim没做太多的锻炼，但他的体能状态却非常好。
5. —Our hliday cst a lt f mney. —Did it? Well, that desn’t matter _____ yu enjyed yurselves. ［2010江西，22］A. as lng asB. unlessC. as sn asD. thugh【解析】选A。句意：——我们的假期花了很多钱。——是吗？不过没关系，只要你们玩得高兴就行。as lng as 只要……； unless 除非； as sn as 一……就……； thugh 尽管。根据句意可知，答案选A。
6. The ld man asked Lucy t mve t anther chair ______ he wanted t sit next t his wife. ［2010辽宁，29］A. althughB. unlessC. becauseD. if
【解析】选C。句意：这位老人请露西移到另一把椅子上，因为他想跟他妻子挨着坐。空格前后两个句子在逻辑意义上存在因果关系，所以用because引导原因状语从句，答案选C。 althugh引导让步状语从句，unless和if引导条件状语从句，均与题意不符。
7. The schl rules state that n child shall be allwed ut f the schl during the day, ______ accmpanied by an adult. ［2010山东，28］A. nce B. when C. if D. unless【解析】选D。句意：学校制度规定，除非有成年人陪伴，否则任何孩子都不允许在校期间出学校。根据句意和句子结构分析，用连接词unless，意为“除非”，引导条件状语从句。 accmpanied by an adult为省略形式，相当于unless he/she is accmpanied by an adult。
8. _____ ur manager bjects t Tm’s jining the club, we shall accept him as a member. ［2010上海，39］A. Until B. Unless C. If D. After【解析】选B。句意：如果我们的经理不反对汤姆加入俱乐部，我们将接受他成为我们中的一员。unless引导条件状语从句，意义等同于if. . . nt，意为“除非，如果不”。
9. Accrding t statistics, a man is mre than twice as likely t die f skin cancer _____ a wman. ［2009江西，24］A. thanB. suchC. sD. as【解析】选D。考查比较状语从句。句意为：据统计，男性死于皮肤癌的几率是女性的两倍多。本句的核心结构为：a man is. . . twice as likely t die f. . . cancer as. . . ，本题mre than修饰twice。
10. —I wnder hw much yu charge fr yur services. —The first tw are free _____ the third csts $30. ［2009安徽，22］A. whileB. untilC. whenD. befre【解析】选A。句意为：——我想知道你要收多少服务费。——前两次是免费的，而第三次的费用是30美元。while而，然而, 表前后对比；until直到；when当……的时候，这时；befre之前，……才……。
1. We have built a new hspital _____ there used t be a garden. ［2011北京模拟］A. in which B. what C. when D. where【解析】选D。句意：我们在以前是个花园的地方新建了一所医院。where引导地点状语从句，表示医院建立的地点。
2. _____ , I have t put it away and fcus my attentin n study this week. A. Hwever the stry is amusingB. N matter amusing the stry isC. Hwever amusing the stry isD. N matter hw the stry is amusing
【解析】选C。考查状语从句。句意：无论这个故事多么有趣，本周我都不得不先把它放到一边，集中精力于我的学习。该句为Hwever引导的让步状语从句，相当于“N matter hw amusing the stry is”。
3. _____ I’m willing t help, I d nt have much time available. A. WhileB. WhenC. OnceD. Since【解析】选A。考查while的用法。句意为：尽管我愿意帮忙，但是我没有太多的空闲时间。while在此处引导让步状语从句，相当于althugh。
4. _____ many Chinese wmen have received higher educatin, there are still bstacles that prevent them frm enjying the same pprtunities fr educatin and emplyment as men. A. WhetherB. BecauseC. WhenD. Althugh【解析】选D。句意：虽然一些中国妇女已接受了较高教育，但依然有许多障碍使她们不能享受与男士一样的受教育与就业的机会。由句意可知用althugh“虽然，尽管”引导让步状语从句。
5. Always put yurself in ther’s shes. _____ yu feel that it hurts yu, it prbably hurts the persn t. A. IfB. UnlessC. UntilD. Thugh【解析】选A。考查状语从句。根据句意“要经常站在别人的立场上（思考问题），如果你觉得它伤害了你，它也可能会伤及别人”，可知，此处表示条件，意为“如果”，故选A项。
6. Yu shuld try t get a gd night’s sleep _____ much wrk yu have t d. ［2011锦州模拟］A. whateverB. n matterC. althughD. hwever
【解析】选D。句意：无论你必须做多少工作，你都应该好好睡一觉。whatever引导让步状语从句，其后常加名词，而当名词前有much修饰时，whatever必须换成hwever; n matter不能单独引导让步状语从句，althugh引导让步状语从句时，句子需用正常语序。故用hwever。
7. _____ , his idea was accepted by all the peple at the meeting. A. Strange as might it sundB. As it might sund strangeC. As strange it might sundD. Strange as it might sund【解析】选D。考查状语从句。as引导的让步状语从句应用倒装语序。句型为：adj. /adv. /n. （一般不带冠词）/v. (原形)+as+主语+谓语，故D项正确。
8. If yu want t d the jb nce mre, yu’d better be mre careful _____ yu make mistakes. ［2011皖南八校模拟］A. whereB. in caseC. s thatD. when【解析】选B。后句句意：你最好认真点，以免犯错。in case引导目的状语，意为“一旦；以免”。与句意相符。
9. Hw lng d yu think it will be _____ the cmputer cmpany puts frward a new prduct? A. befreB. sinceC. untilD. that【解析】选A。句意：你认为还有多久这家计算机公司才能推出一项新产品？It will be / is / was / has been +一段时间+ befre “还有多久才能……”。
10. _____ mst children nwadays are the nly children, they tend t be mre self-centered. ［2011温州模拟］A. Ever sinceB. Nw thatC. Only ifD. Even thugh【解析】选B。句意为：由于现在大多数孩子是独生子女，他们往往会更加以自我为中心。nw that引导原因状语从句，意为“由于，因为”。
11. _____ it is hped that cllege students shuld be equipped with the ability t take a gd set f ntes, this is nt always the case. ［2011南昌模拟］A. When B. While C. As D. Unless【解析】选B。while放在句首引导让步状语从句，意为“尽管，虽然”。句意为：尽管大家期望大学生应具备会做笔记的能力，但事实并非总是如此。
12. Many f them turned a deaf ear t his advice, _____ they knew it t be valuable. A. as ifB. nw thatC. even thughD. s that【解析】选C。句意为：很多人对他的建议置若罔闻，尽管他们知道他的建议很有价值。even thugh引导让步状语从句，意为“尽管，虽然”，符合句意。as if似乎，好像；nw that既然，由于；s that以便，因此。
13. These examples shw that all individuals, _____ they are rich r pr, shuld be respnsible _____ they are invlved in law. A. if; whenB. if; as lng asC. whether; as lng asD. whether; since【解析】选C。句意：这些例子说明所有的人，无论穷富，只要触犯了法律，就应当承担责任。if和whether可互换，但有选择项时用whether; when表时间；since表原因或时间；as lng as表条件，意为只要。故选C。
14. I thught him handsme and hnest _____ I met him. A. the first timeB. fr the first timeC. every time whenD. by the time【解析】选A。句意：我一见到他，我就认为他既英俊又诚实。the first time, every time等表时间的名词短语可直接引导时间状语从句或在其后加that; fr the first time只能作状语，by the time常与完成时连用，故选A。
15. The travelers encuraged each ther t g n _____ difficulties they met. A. hweverB. whateverC. n matterD. althugh【解析】选B。考查状语从句。句意为：无论遇到什么困难，旅游者都彼此鼓励继续前行。whatever无论什么，符合句意。hwever无论如何；althugh尽管；n matter需加what才正确。
16. _____ mst wlves rely n their grups fr fd, shelter and cmpaninship, they have develped a system f signals t keep the grups tgether. A. BecauseB. AlthughC. UnlessD. Where【解析】选A。考查原因状语从句。由句意可知前后为因果关系，故用because。althugh尽管；unless除非，分别引导让步状语从句和条件状语从句，而where引导地点状语从句。
17. _____ many measures have been taken by the gvernment, sme fd pisning events are still happening. A. Unless B. If C. As D. Thugh【解析】选D。考查状语从句。句意为：尽管政府已经采取了许多措施，一些食物中毒事件仍时有发生。thugh引导让步状语从句。
18. We must take measures t prtect endangered wildlife _____ it is t late. ［2011太原模拟］A. as lng asB. whenC. befreD. until【解析】选C。befre it is t late“趁还不是太晚”；as lng as“只要”；until“直到”。
19. The landslide almst flattened the small twn f Zhuqu, leaving 1, 248 dead and 496 missing. I wnder hw lng it will be _____ the peple there get ver the shck. A. befreB. whenC. sinceD. after
【解析】选A。考查状语从句。句意为：那次泥石流几乎夷平了舟曲小城，造成1 248人死亡，496人失踪。我在想，要多久人们才可以从这场灾难带来的震惊中恢复过来。本句使用了It will be+一段时间+befre句型，其中befre意为“直到……才”。
20. An advertisement is useful in _____ it can persuade custmers t buy the kinds f gds in the shp. A. that B. which C. what D. whether【解析】选A。句意为：由于广告能说服人们购买商店的商品所以有用。in that由于，引导原因状语从句。
(21~24题为教师用书独具)21. Yu can never expect t learn smething _____ yu study hard. ［2011合肥模拟］A. unless B. after C. if D. when【解析】选A。句意：除非你努力学习，否则很难学到东西。由句意可知用unless “除非”。
22. —The current internatinal financial crisis is affecting mst cuntries in the wrld. —Wuld it be at least several years _____ everything returns t nrmal? ［2011银川模拟］A. when B. that C. since D. befre【解析】选D。考查连词辨析。句意为：——当前的国际经济危机正在影响世界上大多数国家。——至少要过几年一切才会恢复正常吗？It wuld be +一段时间+befre从句表示“要过多久才……”，符合句意。
23. —They suggest the number f cars shuld be limited t stp air pllutin. —_____ , the idea is nt very practical. A. Sunds gd as itB. As it sunds gdC. As gd it sundsD. Gd as it sunds【解析】选D。考查as引导让步状语从句。句型为：adj. /adv. /n. (一般不带冠词)/v. (原形)+as+主语+谓语，故本题选D。
相关课件
牛津译林版 (2020)必修 第二册Unit 2 Be sporty,be healthy复习课件ppt： 这是一份牛津译林版 (2020)必修 第二册Unit 2 Be sporty,be healthy复习课件ppt，共29页。PPT课件主要包含了assumption，assumping， 重点单词，tendency，reduction，move，energetic，injure，injured，prevention等内容，欢迎下载使用。
外研版高三英语一轮选修8 Modules 1-2复习课件： 这是一份外研版高三英语一轮选修8 Modules 1-2复习课件，共60页。PPT课件主要包含了选修八，图解助记等内容，欢迎下载使用。
外研版高三英语一轮选修7 Modules 1-2复习课件： 这是一份外研版高三英语一轮选修7 Modules 1-2复习课件，共60页。PPT课件主要包含了选修七，辨析→明晰异同，图解助记等内容，欢迎下载使用。
