1、4.3 课时作业.用所给动词的适当形式填空1These milu deer are _ (protect) in Nan Hai Zi Milu Park, in Beijing.2He must _ (praise) by our teacher at this time.3Look! People _ (save) from the train buried under the snow.4_ the meeting _ (hold) in the hall now?5This work _ (not do) at present.6The writer and teacher _ _ _
2、 (give) a warm welcome now.7The meeting _ _ (hold) now is of great importance.8The plan he made a few days ago _ _ _ _ (carry out) now.9The children, who lost their parents in the terrible earthquake, _ _ _ _ _ _ (take good care of) by some welfare organizations.10When he was a boy, he used to go th
3、ere and watch bicycles _ _ (repair)答案：1.being protected 2.be being praised3are being saved 4.Is; being held5is not being done 6.is being given7being held 8.is being carried out9are being taken good care of 10.being repaired.将下列句子改为被动语态1He is drawing a picture in the office._2The girl is repairing th
4、e window._3Many people are watching the man performing._4The dog is running after the beggar._5The manager is punishing the worker for his fault._答案：1A picture is being drawn by him in the office.2The window is being repaired by the girl.3The man is being watched performing by many people.4The begga
5、r is being run after by the dog.5The worker is being punished for his fault by the manager.单句改错1Our children is being looked after by their teachers._2The milk is been produced in the factory now._3The plan is being talked by our classmates._4An idea was come into being._5The beautiful painting is b
6、eing appreciating._答案：1.isare 2.beenbeing 3talkedtalked about 4was comecame 5appreciatingappreciated.完成句子1Dont make any noise. Her mother _ _ _ (正在体检) by a doctor.(examine)2The drivers are told that the road _ _ _ (正在修理中)(repair)3It is reported that a new airport in Kunming which _ _ _ (正在建设中) falls
7、 down.(build)4He noticed that he _ _ _ (有人跟踪) by a strange man when he was walking in the street.(follow)5The cause of the accident _ _ _ _ (正在调查中) so you neednt worry.(look into)答案：1.is being examined2is being repaired/is under repair3is being built4was being followed5is being looked into.阅读理解One a
8、nimal which is still alive, but has almost disappeared from the world, is the Chinese river dolphin or baiji.The baiji is a beautiful animal with a graceful body and a long nose.It is bluegrey with a white underside, weighs between 100 and 160 kilogrammes, and can grow up to eight feet long.It lives
9、 in the middle and lower parts of the Yangtze River. Most dolphins live in the sea so the baiji is very unusual.It is one of only five kinds of river dolphins in the world.In the past, the Yangtze River was home to many thousands of baiji. A book written during the Han Dynasty, 22 centuries ago, tel
10、ls of the river being full of the beautiful creatures. At that time, there were many stories about the baiji. One story said that the dolphin was really a beautiful princess who had drowned in the river. Another said it was a kind of horse that could gallop (急速行进 ) across water, carrying God on its
11、back.Sadly, the situation today is very different. Many millions of people live in the Yangtze River Basin and the river is busy, noisy and polluted. The baiji is almost blind and moves around using sounds. With so many boats and people using the river，the animals cannot find their way around. They
12、are unable to find food, or find each other.Year by year, the number of baiji in the river becomes smaller and smaller.A lot of work is being done to help the baiji.One section of the river has been made into a kind of nature park, where the baiji can be safe.Fishermen work together with scientists
13、and tell them when they see a baiji, or if they find an injured one. Injured animals are taken to a research center and nursed back to be healthy.However, in spite of these measures, scientists estimate (估计) that the mumber of the baiji still alive in the river may be less than 100. If things contin
14、ue as they are, the lovely creature will disappear in the next 25 years.1Which description about the baiji is WRONG?AIt has already died out from the world.BIt is bluegrey with a white underside.CIt lives in the middle and lower parts of the Yangtze River.DIt is one of only 5 kinds of river dolphins
15、 in the world.2The reasons that the baiji is disappearing are the following EXCEPT _.Amany millions of people live in the Yangtze River Basin making there noisy and pollutedBthe baiji is blind because of the pollution and cant find the way aroundCthe boats and people are noisy, making the animals ca
16、nnot find their way around by soundsDthey are unable to find food or find each other by sounds since the river is noisy3Which of the following is the correct way to save baiji?ACatch the baiji and take them to the research center.BMake the whole Yangtze River a nature park for baiji to live.CMake on
17、e section of the river a nature park where the baiji can be safe.DAsk many people to come to the river to help the baiji.4What can we learn from the passage?APeople can take some measures to save the animals dying out.BThe animals dying out are being hunted by human beings.CPeople like to live in th
18、e Yangtze River Basin with animals swimming in the river.DThere are more baiji living in a nature park now.答案与解析：本文讲述了在长江生活的一种濒临灭绝的动物baiji 的生存情况。1解析：细节理解题。由第一段中的.still alive, but has almost disappeared 可知，应选 A。答案：A2解析：推理判断题。第四段讲述了 baiji 减少的原因：它是一种靠声音辨别方向的动物，随着住在长江沿岸的人的增多，长江变得喧闹，它们就找不到方向，找不到食物和同伴了，所以数量剧减。答案：B3解析：推理判断题。baiji 数量减少最重要的原因就是它要依靠声音辨别方向，而人类活动把它所需要的宁静破坏掉了，最好的办法自然就是还给它原有的宁静环境建一片自然公园，当然不可能将整个长江建成自然公园，所以是一部分，C 对 B 错；只需把受伤的 baiji 带回研究中心治疗，不是把每条都抓回去，最适合它们的家还是长江，故 A 错；让许多人
