2. 外语
  3. It is estimated that about 10 million people go into coastal waters every year to get a closer look at whales. When the eco-

It is estimated that about 10 million people go into coastal waters every year to get a closer look at whales. When the eco-

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问题     It is estimated that about 10 million people go into coastal waters every year to get a closer look at whales.
    When the eco-tourists (生态旅游者) try to have a look at the【C1】________mammals rising above the water line, killer whales’ lives are greatly【C2】________, though they are the top of the food chain in the sea.
    "We now have more whale-watch boats than there are whales," said Kelley Balcomb-Bartok of an【C3】________in Washington State that works with scientists to protect whales.
    All this activity is causing people to show more【C4】________about the whales’ health and survival. Some scientists say noise from all the boat traffic may【C5】________a whale’s sonar (声纳，声波) ability as much as 95 percent The whales need sonar to find food.
    Three new studies【C6】________this month suggest the interference caused by the tourists is damaging the whales, whose population in the Puget Sound region has fallen from 98 to 80 in less than a【C7】________. Scientists say all the traffic also forces the whales to move around more, wasting energy needed for【C8】________food.
    "I would say that at times when there are a lot of boats and there is a lot of noise, they are【C9】________," said Tom McMillen, captain of the whale-watching boat Stellar Sea, which takes out three groups a day.
    Scientists say there are less food in the sea for the whales to eat, besides, the pollution in the sea is more serious; 【C10】________, the noise from the boats makes the life of the whales even worse.
    A)  threatened    E) concerns     I) huge       M) released
    B)  decade        F) cautious     J) decrease   N) thus
    C)  delicate      G) irritated    K) monument   O) organization
    D)  initially     H) hunting      L) cease
【C5】
选项
答案J
解析 空白处前为may，后为名词sonar，提示此处应为及物动词，且为原形。文章至此表明人类活动会对鲸鱼的生活造成负面的影响，因此，本句空白处的动词也应具有消极意义，表明噪音对鲸鱼的声纳定位能力会带来负面影响，由此可见，decrease是最适合的词。
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大学英语四级

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