2020-2021学年八年级英语下册 Unit 3 Animals Are Our Friends Lessons 16-18课时作业 （新版）冀教版.docx

1、Unit 3 Lessons 1618.2020青海改编 完形填空Blue whales are the largest animals in the world. But they are amazing 1 because of their huge size, but their slow heartbeat.For the first time, scientists have researched the 2 of a blue whale. They found 3 when blue whales dive(潜水) for food, their heart rates(心率)

2、are as 4 as 2 beats per minute(bpm). Scientists used to 5 that their diving heart rate was 15 bpm. When the whales go to the oceans 6 to breathe, their heart rate is between 25 and 37 bpm.Usually, the larger an animal is, the 7 its heart beats, since it takes more time to pump(输送) blood around 8 bod

3、y. Shrews, the smallest mammals(哺乳动物), have a heart rate of up to 1 000 bpm. Humans usually stay between 60 and 100 bpm.9 slowing their heart rate, blue whales can send more blood to the muscles(肌肉) that they use to pump blood. These muscles 10 stronger, allowing the whales to dive for longer period

4、s of time.()1.A.neitherB.either C.not onlyD.although()2.A.heartbeatB.body size C.divingD.food()3.A.itB.thatC.onceD.if()4.A.manyB.littleC.fastD.slow()5.A.regardB.expectC.thinkD.mix()6.A.bottomB.surface C.centreD.side()7.A.slowerB.thinner C.longerD.faster()8.A.itsB.itsC.hisD.her()9.A.ByB.InC.OnD.At()1

5、0.A.becomeB.climb C.discoverD.dig.任务型阅读阅读下面短文,按要求完成1115题。When an animal becomes extinct(灭绝的), we will never see it again, except for some bones(骨头) on the ground. How sad! Why do animals become extinct?People cut down many trees in Europe, Asia and other parts of the world. This destroys the homes o

6、f many wild animals. For example, some monkeys and apes(猿) eat the fruit and leaves on the tall trees. People cut down all the tall trees, leaving only short ones. If the monkeys and apes dont have food, they will die. With more and more people on the earth, there is less room for animals. Some anim

7、als die out because people hunt(猎杀) and kill them for food. Some people shoot tigers, lions or other animals to make money. They also kill elephants for their ivory(象牙). Tourists can harm animals, too. Turtles lay their eggs on the beach in some countries like Greece, but they cant do this when tour

8、ists are on the beach.Pollution is another killer. As people build more factories and pour dirty water into rivers, many fish get sick and die. And one day, the Arctic(北极) might melt because of global warming(全球变暖). Then where will polar bears live?11题完成句子;12、13题简略回答问题;14题找出并写下全文的主题句;15题将文中画线句子译成汉语。

9、11.People hunt and kill animals to .12.How do people destroy the homes of many wild animals? 13.Where do turtles lay their eggs in Greece? 14. 15. .词语运用阅读下面短文,在空白处填入一个适当的单词或括号内单词的正确形式。Hello. We are students from Thailand, and we want to save the elephants. The elephant is one of Thailands 16.(symbol

10、). Our 17.(one) flag had a white elephant on it. This is a symbol 18. good luck.Elephants are smart animals. They can play soccer or music. They can also draw very 19.(good). People say that an elephant never forgets. Elephants can walk for 20. long time and never get 21.(lose). They can also rememb

11、er places with food and water. This helps 22.(they) to live.But elephants are in great 23.(dangerous). People cut down many trees 24. elephants are losing their homes. People also kill elephants for their ivory. Today there are only about 3 000 elephants(over 100 000 before). We must 25.(save) the t

12、rees and not buy things made of ivory. Remember that March 13th is Thai Elephant Day.答案.1.C2.A3.B4.D5.C6.Bbottom意为“底部”;surface意为“表面”;centre意为“中心”;side意为“边”。根据后句“它们的心率是每分钟25次到37次”及生活常识可知,前句应表示“鲸鱼浮出水面呼吸时”。故选B。7.A8.B9.A10.A.11.get food or make money12.By cutting down many trees.13.Turtles lay their eggs on the beach.14.Why do animals become extinct?15.随着地球上的人越来越多,动物的生存空间越来越小。.16.symbols17.first18.of19.well20.a21.lost22.them23.danger24.so25.save