此卷只装订不密封班级 姓名 准考证号 考场号 座位号 2018-2019学年高二下学期训练卷选修七 Unit3 Under the sea英 语 （二）注意事项：1. 答题前，先将自己的姓名、准考证号填写在试题卷和答题卡上，并将准考证号条形码粘贴在答题卡上的指定位置。2. 选择题的作答：每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑，写在试题卷、草稿纸和答题卡上的非答题区域均无效。3. 非选择题的作答：用签字笔直接答在答题卡上对应的答题区域内。写在试题卷、草稿纸和答题卡上的非答题区域均无效。4. 考试结束后，请将本试题卷和答题卡一并上交。一、阅读理解（共7小题；每小题2分，满分14分）AThere are many dangerous sea creatures in the world. The following are some examples.The needlefish are commonly seen living near the surface of tropical (热带的) waters. But they can also break cover the water, and once in the air they can become dangerous flying swords. Though it is rare, people have been seriously hurt and even killed by the fish. Night fishermen in small boats are at particular risk because their lights may attract the fish.Saltwater crocodiles are the worlds largest crocodiles，sometimes reaching 23 feet in length and topping 2,200 pounds. Yet these crocodiles hunt quietly，lying in wait below shoreline waters to attack turtles and thirsty animals that have come to drink. Saltwater crocodiles kill a number of people each year.There is no doubt that the great white shark sits atop the ocean food chain. The worlds largest fish can weigh at over 5，000 pounds and reach lengths of more than 20 feet. Great white sharks have about 3，000 teeth，which they typically sink into sea lions，seals，and sea turtles. These sharks are responsible for a third to a half of the 100 shark attacks on humans every year.The sea anemone (海葵) may look like the beautiful flower for which its named，but fish that swim too close may regret it. The sea anemone，which lives on the sea floor，uses its poisonous tentacles (触须) to stab passing creatures with a kind of poisonmaking them helpless and fit to be eaten.The surgeonfish (刺尾鱼) is an attractive reef fish that is poisonous. Scientists believe that the worlds seas hold some 1, 200 different surgeonfish species and think that they injure about50,000 people per year. But the surgeonfish poison can also bring great benefitthey are useful in the development of new drugs.1. The underlined phrase “break cover” in Paragraph 2 probably means _.A. jump out ofB. break away fromC. get away fromD. go back to2. How many attacks on humans do great white sharks do every year?A. About 26.B. About 45.C. About 60.D. About 75.3. It can be learned from the passage that _.A. the saltwater crocodiles are gentle and never hurt peopleB. the sea anemone lives near the surface of the seaC. the great white shark is the largest fish in the worldD. the needlefish live in the sea all around the world4. Which of the following can be used to benefit human society?A. The needlefish.B. The sea anemone.C. The great white shark.D. The surgeonfish.【答案】1-4 ABCD【解析】本文是说明文，介绍了5种危险的海洋生物。1.词义猜测题。根据后文“once in the air”可知，needlefish在空中的时候会变成危险的飞剑，由此可以猜测画线短语的意思应该是“跳出(离)”之意。故选A。2.细节理解题。根据第四段“These sharks are responsible for a third to a half of the 100 shark attacks on humans every year.”可知，大白鲨每年袭击人类次数大约为3350次左右。故选B。3.细节理解题。根据第四段“The worlds largest fish can weigh at over 5，000 pounds and reach lengths of more than 20 feet.”可知，大白鲨是世界上最大的鱼。故选C。4.细节理解题。根据文章最后一段“they are useful in the development of new drugs”可知，刺尾鱼的毒可以制造药品，由此可知这种鱼可以造福人类社会。故选D。BThere is a huge demand for shark fins (鳍) in Asian countries. As a result, many sharks are caught and killed. In Palau, where more than half of tourists are drawn by diving excursions, each reef shark brings in about $179,000 in tourism revenue annually, or about $1.9 million during its lifetime. Due to overexploitation and lack of proper management, many shark species are under considerable risk of unrecoverable decline with some species having declined to near extinction in recent years. According to reports, sharks are being killed at an alarming rate of up to 273 million worldwide per year.Some experts predict that if the killing continues at the current rate many shark species will be lost forever. It can be very dangerous. Sharks are very important and they should be protected.In a study of the east coast of the United States, 11 species of sharks were eliminated from their range. Of the 14 species of ocean life that those sharks used to eat, the populations of 12 exploded and caused great damage to the ecosystem. For example, the cownose ray (鳐) population was no longer kept under control by sharks and so grew out of control. As a result, the rays destroyed the population of bay scallops (扇贝), their favorite food. The scallop fishery, which had been in good condition for over 100 years, was wiped out. Also, the removal of the scallops most likely had an effect on water quality as they were no longer there to perform their function of cleaning the water.Sharks play a vital role in the oceans in a way that the average fish does not. Most sharks serve as top predators at the pinn