According to the passage, which of the following statements is TRUE?

A．Starving polar bears are increasingly coming into villages, where they .may be killed either for food or safety.

B．Polar bears can spend their entire lives on land if the sea ice melts completely.

C．Two-thirds of the world' s polar bears may disappear by 2050 as ,global warming continues.

D．The growing distance between ice packs is not a problem for polar bears, because they are excellent swimmers.

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参考答案

答案解析

【定位】此类题型的定位比较繁琐，因为在题干中无法寻找到定位线索词，做题的方法为——从选项人手，找到各个选项的关键词，再分别到原文定位。
【答案详解】细节题。A选项中提到北极熊因为饥饿而闯入村庄——coming into village，这个在原文中没有信息提到，所以排除。B选项中的spend their lives on land帮助我们定位到原文的第三段开头——polar bears Can’t survive for long on land．与选项意思正好相反，所以排除。原文第二段最后一句That may cause two-thirds of the word’s 20，000 polar bears to be gone by then too．及前一句…the Arctic could be free of summer sea ice by 2050与C选项信息一致。
原文第四段第三句话The bears must swim longer distances between ice packs(大片浮冰)，and they can’t always make it．与D选项中not a problem意思相左，因此排除。故选C。

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1 What' s the mission of Polar Bears International?

A．Saving energy.

B．Conducting scientific research.

C．Seeking international cooperation.

D．Saving polar bears and their home.

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2 根据下面资料，回答题
The exact number of English words is not known. The large dictionaries have over half a mil-lion entries, but many of these are compound words ( schoolroom, sugar bowl) or different deriva-tives of the same word ( rare--rarely, rarefy), and a good many are obsolete words to help us read older literature. Dictionaries do not attempt to cover completely words that we can draw on: the in-formal vocabulary, especially slang, localism, the terms of various ,occupations and professions;words used only occasionally by scientists and specialists in many fields; foreign words borrowed for use in English; or many new words or new senses of words that come into use every year and that may or may not be used long enough to warrant being included. It would be conservative to say that there are over a million English words that any of us might meet in our listening and read-ing and that we may draw on in our speaking and writing.
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A．more than half a million

B．at least 24,000

C．at least 80,000

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A．no longer in use

B．profound

C．Colorful

D．common

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