Question

    A study has warned that seafood supplies from the world's oceans could be almost gone by the middle of the century. The researchers say there has already been a breakdown in wild populations of almost one third of currently fished sea-foods. The study says that means their catch has fallen by ninety percent from their highest level. Boris Worm of Dalhousie University in Nova Scotia Canada led the intentional team that did the study. Professor Worm says species have recently been disappearing from oceans at an increasing speed. At this rate he says all seafood species could collapse by 2048.

Other studies have also warned about the dangers of overfishing and the effects on ocean environments. But not everyone thinks the oceans are likely to be empty, in, fifty years.Some scientists said parts of the world do have problems but others arc doing a good job of protecting fish populations. Government officials in several countries with large fishing industries also questioned the research.

The study appeared earlier this month in Science magazine.

The researchers say damage to oceans affects not only fish populations but also the productivity of ecosystems. These complex systems help control water quality. The scientists say the loss of different kinds of sea life appears to increase the risk of fish kills and beach closures from harmful algae growth.

The scientists examined the results of thirty-two experiments and observed forty-eight protected areas. They also looked at records of catches worldwide. They studied records from the United Nations Food and Agriculture Organization from 1950 to 2003. And they examined archaeological information and other historical records for twelve coastal areas. That research reached back over a thousand years.

Boris Worm says the findings are, in his words, “beyond anything we suspected.”But he also said the situation is not too late to core. He said that with good fisheries management, some species could completely recover in three to ten years.

1.The two underlined words “their” in the first paragraph most probably mean        .

A.researchers' B.fisherman's

C.sea foods' D.the oceans'

2.Which of the following is true according to the passage?

A.All the scientists don't believe that all seafood species will disappearing very soon

B.Most government officials disagree to the seafood-disappearing research

C.Some scientists are doing a good job of protecting fish populations

D.It's too late to take any action to improve the situation.

3.According to Boris Worm,             .

A.Some people are doing a good job of protecting fish populations

B.Overfishing is one of the causes for the loss of seafood species

C.things are getting worse though efforts can be made

D.some more species will come into being with right measures

4.What is the main purpose of the passage?

A.To call on people to protect the ocean environment

B.To introduce a study about the disappearing of sea foods

C.To report different opinions about the seafood research

D.To criticize the present fisheries management

Answer

1.C

2.A

3.B

4.B

【解析】

这是一篇说明文。一项研究警告说，到本世纪中叶，来自世界海洋的海产品供应可能几乎消失，其他研究也对过度捕捞的危险和对海洋环境的影响提出了警告。但是也有人对研究提出了质疑，有些地区在保护鱼类种群方面做得很好。如果渔业管理得当，一些物种可以在3到10年内完全恢复。

1.

词义猜测题。根据第一段The researchers say there has already been a breakdown in wild populations of almost one third of currently fished sea-foods. 研究人员说，在目前捕捞的海产品中，近三分之一的野生种群已经灭绝。所以研究表明，这意味着海产品的捕获量比最高水平下降了90%。根据上下文的语境判断出，their指的是“海产品的”。故选C项。

2.

细节理解题。根据第二段第二句But not everyone thinks the oceans are likely to be empty in fifty tears.不是所有的人都认为50年内海洋会枯竭。所以并不是所有的科学家都相信所有的海鲜物种都会很快消失。故选A项。

3.

推理判断题。根据第二段Other studies have also warned about the dangers of overfishing and the effects on ocean environments. 其他研究也对过度捕捞的危险和对海洋环境的影响提出了警告。根据最后一段He said that with good fisheries management, some species could completely recover in three to ten years. 如果渔业管理得当，一些物种可以在3到10年内完全恢复。由此判断出，据鲍里斯·沃姆说，过度捕捞是导致海产品物种灭绝的原因之一。故选B项。

4.

推理判断题。一项研究警告说，到本世纪中叶，来自世界海洋的海产品供应可能几乎消失，其他研究也对过度捕捞的危险和对海洋环境的影响提出了警告。但是也有人对研究提出了质疑，有些地区在保护鱼类种群方面做得很好。如果渔业管理得当，一些物种可以在3到10年内完全恢复。由此判断出，这篇文章的主要目的是介绍一项关于海产品消失的研究。故选B项。