Unit 5 导读 话题妙切入 教材讲解 2021-2022学年 外研版（2019）高中英语必修第一册

Animals are such agreeable friends—they ask no questions，they pass no criticisms.—George Eliot动物是如此怡人的朋友，它们不问任何问题，也不提出批评。——乔治·艾略特Protecting wildlife means protecting human beings themselves.保护野生动物就是保护人类自己！Everybody is responsible for protecting animals.Please maintain the ecological balance.保护动物，人人有责。请维持生态平衡。Protect wild animals and do not shoot birds or catch snakes and frogs.保护野生动物，不打鸟，不捉蛇和青蛙。Love life and stop killing.关爱生命，停止杀戮。One day，the kangaroo was found out of the cage，so the zookeepers held a meeting and agreed to raise the height of the cage from 10 meters to 20 meters.The next day，the kangaroo was found still outside，so they decided to increase the height to 30 meters.It was unexpected to see all the kangaroos running out the next day.The administrators were so nervous that they decided to raise the height of the cage to 100 meters.One day the giraffe and some kangaroos were chatting，“Do you think these people will continue to raise your cage？”Asked the giraffe.“It's hard to say”，the kangaroo said，“if they keep forgetting to close the door again！” It is very important to grasp the key point of the problem.A stranded whale with plastic in his belly was seen in Wakatobi，Southeast Sulawesi，Indonesia，in November，2018.Later that year，the carcass (尸体；骨架)of a sperm whale that washed ashore in eastern Indonesia was found to contain a huge lump of plastic waste — including bags and cups.The death of the two whales best illustrate the massive plastic waste problem in Asia.The news raised concern among environmentalists and government officials in the region.The carcass of a gray whale lay on the shore of Olympic Peninsula，Washington，the US，on May 24，2019.So far this year，37 dead gray whales have turned up in California waters，three in Oregon，25 in Washington State and five in Alaska，say officials of NOAA's National Marine Fisheries Service.Five more were found in British Columbia.Many dead gray whales have little body fat，leading experts to suspect the die­off is caused by declining food sources in the dramatically warming waters of the northern Bering Sea and Chukchi Sea off Alaska.[探索发现]1．What does the death of the sperm whale show? The massive plastic waste problem in Asia.2．What's the reason of many gray whales' death?Their food sources are declining.3．What do you think we should do to help whale?略