The word "cubs" in the fourth paragraph is closest in meaning to __________.

A．adults

B．babies

C．hunters

D．enemies

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参考答案

答案解析

【定位】根据线索词cubs，定位至第四段最后一句“These conditions call cause polar-bear cubs to become separated from their mothers．who provide them、with food．”。
【答案详解】词汇题。阅读理解中的词汇题考的永远不是词汇本身，而是联系上下文对文章的理解。因此找到包含考查词汇的句子后，要先通读整个句子。我们在这个句子中发现cubs之后出现their mothers，可以推断，cubs和mothers是相对应的，因此意思是“孩子”。故选B。

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1 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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2 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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3 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.
Professor Seashore concluded that In'st-graders enter school with at least 24,00Owords and add5,000 each year so that they leave high school with at least 80,000. These figures are for recogni-tion vocabulary, the words we understand when we read or hear them. Our active vocabulary, the words we use in speaking and writing, is considerably smaller You cannot always produce a word exactly when you want it. But consciously using the words you recognize in reading will help get them into your active vocabulary. Occasionally in your read-ing pay particular attention to these words, especially when the subject is one that you might well write or talk about. Underline or make a list of words that .you feel a need for and look up.the less familiar ones in a dictionary. And then before very long find a way to use some of them. Once, you know how they are pronounced and what they stand for, you can safely use them.
According to the author' s estimation, there are __________ words in English.

A．more than half a million

B．at least 24,000

C．at least 80,000

D．more than a million

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