外研版 (2019)选择性必修 第一册Unit 6 Nurturing nature优秀ppt课件

核心素养提能练

Ⅰ.语法填空

Wang Wei was a really good student，but recently he hasn’t felt himself and his grades 1.        (fall) since three months ago.This is because he sometimes has trouble 2.        (pay) attention to his study.He wouldn’t like to talk with teachers and friends，too.What’s worse，he feels 3.        (tire) all the time and has difficulty in falling asleep.His teachers and classmates are concerned about him very much.What he does brings his mother’s attention，too.However，when his mother asks him 4.         happens to him，he just says he feels like crying.

As a matter of fact，Wang Wei is suffering 5.         clinical depression(临床抑郁症)，6.      is a serious，but treatable condition.If it is not treated in time，serious damage 7.    (do) to health.The first signs of it in teens are 8.        (poor) school reports than before，then learning difficulties and staying away from classmates and teachers.If you have these signs，don’t worry.It is not so difficult 9.        (deal) with clinical depression.There are many effective ways，such as medicine,10.        (express) of feelings，more exercise and a balanced diet.

1．答案　have fallen

解析　考查动词的时态。由句中的since three months ago可知，此处用现在完成时。

2．答案　paying

解析　考查非谓语动词。have trouble (in) doing sth.，表示“做某事有困难”，为固定短语。故填paying。

3．答案　tired

解析　考查词性转换。feel为系动词，后接形容词作表语，此处表示人的状态，故填tired。

4．答案　what

解析　考查名词性从句。此处引导宾语从句且在宾语从句中作主语，故填what。

5．答案　from

解析　考查介词的用法。句意为：事实上，王伟患上了临床抑郁症，这是一种严重但可治疗的疾病。suffer from遭受。

6．答案　which

解析　考查非限制性定语从句。clinical depression 为先行词，关系词作从句的主语，所以用which引导该定语从句。故填which。

7．答案　will be done

解析　考查动词的时态和语态。if引导的条件状语从句，主句为将来时，从句为一般现在时。主句的主语serious damage与谓语do为被动关系。故填will be done。

8．答案　poorer

解析　考查形容词比较级。由后面的“than”可知，应用poor的比较级poorer。

9．答案　to deal

解析　考查非谓语动词。句意为：治疗临床抑郁症并不难。it is＋adj.＋to do sth.为固定句型。故填to deal。

10．答案　expression

解析　考查词性转换。句意为：有很多有效的治疗方法，如药物、表达情感、多运动和均衡的饮食。此处的and连接了一系列的名词，所以填expression。

Ⅱ.补全书面表达

 阅读下面短文，根据其内容写一篇60词左右的内容概要。

The largest land animal remaining on the earth，the African elephant is of much importance to African ecosystem.Unlike other animals，the African elephant is to a great extent the builder of its environment.As a giant plant-eater，it significantly shapes the forest and savanna(大草原) surroundings in which it lives，therefore deciding the conditions of existence for millions of other animals that live in its habitat.

It is the elephant’s great desire for food that makes it both a disturber of the environment and an important builder of its habitat.In its continuous search for the 300 pounds of plants it must have every day，it kills small trees and underbushes，as well as pulls branches off big trees.This results in numerous open spaces in not only deep tropical forests but also the woodlands that cover part of the African savannas.In these open spaces are numerous plants in various stages of growth，which attract a variety of other plant-eaters.

Take the rain forests for example.In their natural state，the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor.By pulling down trees and eating plants，elephants create open spaces，allowing new plants to grow on the forest floor.In such situations，the forest become suitable for large-hoofed plant-eaters to move around and for small-sized plant-eaters to obtain their food as well.

Scientists are worried now that the African elephant has become an endangered species.If the elephant dies out，scientists say，many other animals will also disappear from vast areas of forest and savanna，greatly changing and worsening the whole ecosystem.

请根据括号里的汉语提示，补全短文。

The African elephant is very important to(对……来说是重要的) African ecosystem.(要点1) By consuming lots of plants(消耗大量的植物) in its habitat，the elephant produces enough room for abundant new plants，then feeding various animals(喂养各种动物)．(要点2) Thanks to elephants，rain forests are less dense，which is more proper for(对……来说更合适)survival of creatures.(要点3) Once the African elephants go extinct，the entire ecosystem will be threatened(将会受到威胁)．(要点4)