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
【C2】
选项
答案A
解析 此处应为动词的过去分词，与are构成谓语。本句though引出的让步状语从句表明虽然杀人鲸体型庞大，处于食物链的最高一级，但它们的生命仍然受到负面的影响，由此可以推断空白处的动词具有消极意义，词库中的threatened最符合本句句意。
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大学英语四级

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