2019-2020学年高中英语 Unit 22 Environmental Protection课后限时作业1 北师大版选修8

课后限时作业(一)语言知识练 .单句语法填空1do look _ahead_ before doing whatever you want to do.2the president spoke at the business meeting for nearly an hour without _referring_(refer) to his notes.3he told me how he had given me shelter and protection, without which i _would_have_died_(die) of hunger.4dont leave her _waiting_(wait) outside in the rain.5tom advocated that attention _(should)_be_paid_(pay) to reforming education system.6scores of guests _had_been_trapped_(trap) in their rooms before the police arrivedtoo terrified to move.7i didnt condemn him _for_ what he had done.8the number of people _is_ sixty at present, but a number of people _are_ coming here to get tickets for free.(be)9the new evidence led to the thief _being_arrested_(arrest)10_given_(give) that there was so little time, i think theyve done a good job.课文语法填空scientists have reached consensus 1._that_ human beings are causing global warming.they claim that it 2._is_seen_(see) as a danger and is relevant 3._to_ our lives.global warming refers to an average increase in the earths temperature that, in turn, 4._leads_(lead)to climate change.over the last 100 years, plenty of carbon dioxide goes 5._into_ the atmosphere every year and the temperature 6._has_increased_(increase) by 1f.and this will cause 7._terrible_(terribly) climate changes.governments all over the world have a 8._responsibility_(responsible) to take action to prevent this 9._from_ going on.and a lot of things can be recycled 10._to_save_(save) natural resources.高考题型练.阅读理解scientists think they have answered a mystery: how some ocean creatures got so huge so quickly?a few million years ago, the largest whales, averaged about 15 feet long.then seemingly overnight, one type of whale, the toothless baleen whale(须鲸) became huge.modern blue whales get as big as 100 feet.nicholas pyenson of the smithsonian natural history museum said, “why is that？” “it_happened_in_the_glance_of_an_evolutionary_eye,_which makes it harder to figure out what happened，” said graham slater, lead author of the study.their study has suggested an answer: ice ages in the last 3 to 5 million years started it, changing the oceans and food supply for whales.the researchers used fossil records of the smaller whales to create a family tree for baleen whales, which include blue whales, humpbacks and right whales.using computer simulations(模拟) and knowledge about how evolution works, they concluded that when the size changes started, the poles got colder, ice expanded and the water circulation in the oceans changed and winds shifted.slater and pyenson said cold water went deep and moved closer to the equator(赤道) and then eventually moved back up with small fish and other small animals that whales eat.baleen whales which have no teeth feed by eating huge amounts of fish they capture.toothed whales, like sperm whales(抹香鲸), hunt individual fish, so the ocean changes that made food less evenly spread out didnt affect them as much.but baleen whales hunt schools of fish.olivier lambert at the royal belgian institute of natural sciences calls it “a really convincing situation”but he said the lack of fossils in certain time periods is an issue.as oceans warm from manmade climate change, the seas will be more like it was when the whales were smaller and they will have a more difficult time surviving.语篇导读本文为说明文，以鲸鱼为例分析了一些海洋动物生长变快、体型变大的原因，并指出气候变化引起海洋变化，目前全球变暖导致部分鲸鱼将面临生存困难。1what does the underlined sentence mean in paragraph 2?athe change of baleen whales happened too quickly.bthe change of baleen whales was too difficult to explore.cresearchers paid little attention to the change of baleen whales.dresearchers thought the change of baleen whales was unimportant.解析 a句意理解题。根据下文中的which makes it harder to figure out what happened可推知，画线句子指这种变化在进化的过程中只是匆匆一瞥，形容其速度之快，故选a项。2what played the key role in baleen whales becoming huge?amanmade climate change.bits eating a huge amount of fish.cthe water circulation in the oceans.dthe increase of food supply for whales.解析 d推理判断题。根据第二段最后一句、第三段最后一句及第四段最后一句可知，由于海水流向和鲸鱼食物来源的变化，须鲸能捕获到更多鱼群，随着食物增多，其体积变大，故选d项。3what do we know about sperm whales and blue whales according to the passage?asperm whales eat more food.bblue whales live much longer.cblue whales usually swallow schools of fish.dsperm whales prefer to hunt schools of fish.解析 c推理判断题。根据第三段第一句可知，蓝鲸属于须鲸；又根据第四段最后一句可知，须鲸能捕获鱼群，由此可推知，蓝鲸也能捕获鱼群，故选c项。4what can we infer from the last paragraph?athere are no whale fossils now.bthe whales may become even bigger.colivier lambert thinks the study is perfect.dglobal warming has threatened the whales.解析 d推理判断题。根据最后一段最后一句可知，气候变暖引起海洋变化，造成鲸鱼将面临生存困难的状况，故选d项。.七选五volunteering can, in fact, help you reduce stress, learn new skills, find new friends, and make a real difference in your community.if you give it a try, it might open the door to a revolutionary time in your life._1_.you can make a real differenceyou are extremely lucky.you have clean water, clothing, footwear, food, and access to free education._2_.use your skills to make a real difference in your community.do you like to read? consider teaching.do you love animals? _3_.are you handy? volunteer to build houses and schools for the less fortunate.it gives you a sense of purposewhen you volunteer, you will find the things that drive you and make your heart pound with excitement.it changes your view.and it can also help you realize what you are truly supposed to do in your life._4_helping others and being useful can bring you high satisfaction and motivation, which are the foundation for a healthy mind and body.the social contact aspect of volunteering can have a powerful effect on your overall wellbeing._5_.volunteering will make you feel good.it will help you appreciate the amazing, generous life youve been given, and it will help you grow as a person.awork at an animal shelterbmaybe its time to give back a littlecvolunteering brings happiness to your lifedvolunteering is good for your mind and bodyewith that in mind, here are three reasons why you should volunteerfstudies have found that working with animals can reduce stress and anxietygafter all, nothing fights stress better than a real connection with a likeminded(志同道合的) person语篇导读本文为说明文，从三个方面分析了参与志愿活动的原因。1解析 e顺承关系。根据上文提到的做志愿的好处及下文的几个小标题可知，e项符合语境，故选e项。2解析 b顺承关系。根据上文提到的(你很幸运，有干净的水，衣服，鞋子，食物，而且能接受免费的教育)及空后一句(使用你的技能在你的社区中真正地有所作为)可知，b项(也许到你回报的时候了)符合语境，故选b项。3解析 a并列关系。根据上下文可知，此处应是讲喜爱动物的人可以做的事情，a项句式与上下文一致，故选a项。4解析 d总分关系。根据本段中的which are the foundation for a healthy mind and body可知，本段讲的是志愿活动有益于身心健康，故选d项。5解析 g递进关系。根据空前一句可知，志愿活动的社会交往方面对你的全面健康有很大的影响。g项(没有什么比与志同道合的人保持联系更能战胜压力)承接上文，故选g项。.短文改错i will forget the experience of beginning to learn english. i liked english i could not the right method of learning. the more i to remember, the harder i found it was. i was in low s