高中英语外研（2019）版必修二Unit6 Earth first单元自测卷（含答案）

Unit6 Earth first单元自测卷 时间：100分钟　　　满分：120分 　选择题部分 第二部分　阅读理解(共两节，满分40分) 第一节(共15小题；每小题2分，满分30分) 阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。 A The gentle giants of our oceans are whale sharks. It's the biggest whale shark and can reach as long as 41.5 feet, and these amazing creatures are not only the biggest sharks, but they are also biggest fish of any kind. Whale sharks have a lifespan of 70 years on average, and they spend their days gently swimming in the warm and tropical oceans. Their teeth are the size of match heads, and while their jaws could be powerful, they have never tended to attack humans. Their teeth play no role in eating, as plankton (浮游生物) does not need to be chewed. They are to be found in numbers in the warmer oceans and they prefer the deep waters of open oceans. They tend to travel alone. Several times a year they gather together in certain spots where plankton is plentiful. Those areas are all within a 30°north or south latitude from the equator. Sadly whale sharks are targeted by commercial fisheries at those spots. How easy it must be for the fishermen to catch those beautiful creatures who can only swim at 3.5 miles per hour! So great a loss in numbers have they suffered that whale sharks are now listed as one of the endangered species. Some countries have started to take measures to protect the whale sharks from extinction. The Philippines, India and Taiwan have all banned the fishing, selling, importing and exporting of whale sharks for commercial purposes. However, the law doesn't seem to be effective because the hunting and killing still goes on today, especially in Taiwan and the Philippines. Each whale shark can fetch around $21,000. In parts of Asia they are known as the “money shark”． The mighty dollar wins again at great cost to our habitat, and we will not know what we have lost until we have lost it forever. Therefore, it is high time for us to do something for the whale sharks. 1．We can learn from the passage that whale sharks_____. A．usually live a life of more than 70 years B．always travel in the ocean in groups C．depend on their teeth to harvest their food D．live in the deep waters of warmer oceans 2．Why can the whale sharks be caught easily? A．Because they swim in the oceans at a slow speed. B．Because they are surrounded by so many fisherman. C．Because they often gather together. D．Because they never tend to attack humans in the water. 3．It is implied in the passage that_____. A．whale sharks will be extinct even if they are protected B．whale sharks are the most dangerous marine animals C．there is no law about banning the fishing of whale sharks D．the huge profit is to blame for the decreasing numbers of whale sharks 4．What is the main purpose of this passage? A．To appeal to people to protect whale sharks. B．To advise the government to make related laws. C．To guide people how to fish and kill whale sharks. D． ... ...