1、课时作业16.把下面的句子改成被动语态(每空一词)1The government is making great efforts to improve the living conditions of the people.Great efforts _ _ _ to improve the living conditions of the people by the government.2The farmers are cutting down the jungles in this area so quickly that the wild animals may lose their
2、homes in the near future.The jungles in this area _ _ _ _ by the farmers so quickly that the wild animals may lose their homes in the near future.3People are hunting too many animals these years in some places.Too many animals _ _ _ by people these years in some places.4The teacher is correcting the
3、 papers in her office.The papers _ _ _ by the teacher in her office.5Our headmaster is preparing a speech now.A speech _ _ _ by our headmaster now.6The family are building a new house over there.A new house _ _ _ by the family over there.7The doctors are operating on his left leg.His left leg _ _ _
4、_ by the doctors.8The farmers are harvesting crops in the field with their faces covered with sweat.The crops in the field _ _ _ by the farmers with their faces covered with sweat.9They are discussing whether they will go for a picnic tomorrow.Whether they will go for a picnic tomorrow _ _ _ by them
5、.10The government is protecting the tigers in the newlybuilt reserve.These tigers _ _ _ in the newlybuilt reserve by the government.答案1are being made2.are being cut down3are being hunted4.are being corrected5is being prepared6.is being built7is being operated on8.are being harvested9is being discuss
6、ed10.are being protected.用所给词的适当形式填空1Excuse me, what time is it now?Sorry, my watch doesnt work. It_ (repair) at the shop.2Are they about to have dinner?Yes, it _ (serve) in the dining room.3Cant you see your problem _ (discuss)?Have some patience, please.4Do you know what Lily is doing?She may _ (i
7、nterview) in the office.5By the way, have you moved into the new house?Not yet. The walls _ (paint)6This urgent problem _ (talk) about by the managers.7The new generation of computers, with artificial intelligence, _ (develop) and perfected now.8Zappas music _ (play) in the hall now.9Have you handed
8、 in your schoolwork yet?Yes, I have. I guess it _ (grade) now.10You cant use the machine today because some parts _ (replace) this week.答案1is being repaired2.is being served3is being discussed4.be being interviewed5are being painted6.is being talked7are being developed8.is being played9is being grad
9、ed10.are being replaced.句型训练1A plan about building a new attraction in this town _ now. (carry)在这个镇建一个新的旅游景点的计划现在正在实施。2All boats arriving in Sicily _ to find out if they have rubbish in them from other parts of Italy. (inspect)所有到达西西里岛的船只都在接受检查，以发现他们是否装有从意大利其他地方带来的垃圾。3If the rainforests _ at such a
10、rapid speed, they will disappear from the earth in the future. (destroy)如果(热带)雨林以这样快的速度被破坏，将来它们将会从地球上消失。4Although the practical cure for cancer _，we have practical ways to prevent it. (study)尽管治疗癌症的切实可行的方法仍在研究中，但是我们还是有实际的方法去预防它。5Rare animals _ although there is severe punishment for it. (hunt)尽管有严厉的
11、惩罚措施，稀有动物仍然遭到猎杀。答案1is being carried out2are being inspected3are being destroyed4is still being studied5are still being hunted.七选五Sharks are among the oldest animals on Earth. There are hundreds of kinds of sharks. Most are about two metres long. The dogfish shark, however, is less than twenty centim
12、etres in length. A shark has an extremely good sense of smell. It can find small amounts of substances in water, such as blood, body liquids and chemicals produced by animals. _1_ Sharks eat fish, other sharks, and plants that live in the ocean. Sharks grow slowly. About forty per cent of all sharks
13、 lay eggs. _2_ Some sharks carry their young inside their bodies as humans do. Some sharks are not able to reproduce until they are twenty years old. Most reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, overfishing of sharks is of special danger t
14、o the future of the animal.Sharks are important for the worlds oceans. They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too great. _3_ People hunt sharks for sport, food, medicine and their skin. Experts say the internatio
15、nal market for some kinds of sharks has increased because many parts of a shark are valuable. Collectors pay thousands of dollars for the jaws of a shark. _4_ The skin of a shark can be used like leather. In Asia, people enjoy a kind of soup made from shark fins. Experts say a fisherman can earn a l
16、ot of money for even one kilogram of shark fins. Sharks are among the oldest animals on Earth, but some sharks are in danger of disappearing from Earth. _5_AShark liver oil is a popular source of vitamin A.BThis protects the plants and other forms of life that exist in the oceans.CSharks are valuabl
17、e to us and we can make full use of them.DThese powerful senses help sharks find their food.EIf too many sharks in one area are killed, that group of sharks may never return to normal population levels.FThey are a threat to other forms of life in the ocean.GThe others give birth to live young.答案与解析本
18、文主要介绍了地球上最古老的生物之一鲨鱼以及鲨鱼现在所面临的危险情况。1D根据上文“It can find small amounts of substances in water, such as blood, body liquids and chemicals produced by animals.”可知鲨鱼灵敏的嗅觉可以使它们找到水里的如血、体液以及动物产生的化学物质。这种能力让它们迅速找到食物。故D正确。2G本段前两句是在叙述鲨鱼的繁衍方式。根据“About forty per cent of all sharks lay eggs.”可知大约百分之四十的鲨鱼产卵，其余的鲨鱼直接生出
19、小鲨鱼。故G正确。3B根据上文“Their hunting activities mean that the numbers of other fish in ocean waters do not become too great.”可知，鲨鱼可以保持海洋的生态平衡，不让某些生物的数量太大。这间接地保护了海洋里的其他生物。故B正确。4A根据“Collectors pay thousands of dollars for the jaws of a shark.”和“The skin of a shark can be used like leather.”可知本段是在叙述鲨鱼各部位的价值，选
20、项里只有A项符合语境。故A正确。5E根据“Sharks are among the oldest animals on Earth, but some sharks are in danger of disappearing from Earth.”可知某些鲨鱼已经面临着灭绝的危险。那么一旦大量的鲨鱼被捕杀，这种鲨鱼就很难恢复到正常的数量。故E正确。.概要写作阅读下面短文，根据其内容写一篇60词左右的内容概要。Researchers who use animals in psychological experiments must make every effort to minimize (
21、最小化) discomfort, illness, and pain. And procedures that cause animals great suffering are permitted only when no other procedure is available. Moreover, there are federal regulations stating how animals art to be housed, fed and preserved. Not only must researchers try very hard to avoid causing phy
22、sical discomfort, they are also required to promote the psychological wellbeing of some species of research animals, such as monkeys.Why should animals be used for research in the first place? Is it really possible to learn about human behavior from the results of research employing rats and pigeons
23、? The answer is that psychological research that does employ animals has a different focus and is designed to answer different questions compared with research that uses humans. For example, the shorter life span of animals (rats live an average of two years) allows researchers to learn about the ef
24、fects of aging in a much smaller period than they could by using human participants. Moreover, some principles of behavior are similar across species, and so some basic behavioral phenomena can be studied more simply in animals. Finally, some studies require large numbers of participants that share
25、similar backgrounds or have been exposed to particular environmentsconditions that could not practically be met with human beings.Research using animals has provided psychologists with information that has greatly benefited humans. For example, it provided the keys to noticing eye disorders in child
26、ren early enough to prevent permanent damage.Despite the value of research with animal participants, the use of animals in psychological research is highly controversial. For example, some critics believe that animals have rights no less significant than those of humans, and that because animals are
27、 unable to agree to participation in studies, their use is not moral. Others object to the use of animals on methodological (方法论) grounds, saying it is impossible to generalize from finding on nonhuman species to humans._范文Researchers must follow rules to help animals not suffer in psychological exp
28、eriments.(要点1) Psychological research using animals can make psychologists learn about human behaviors more effectively, more simply and more practically. (要点2) And research also has provided information for psychologists to benefit humans. (要点3) However, the use of animals in psychological experiments has caused a lot of discussion and disagreement in the public.(要点4)