【題目】Polar bears are suffering in a 【1】(warm) world.

Polar bears live in environments too cold for most animals.【2】much of the year, they live and hunt on the frozen Arctic sea ice. Nature has prepared 【3】for the cold conditions. But nothing has prepared the bears for the danger that 【4】 (threat)the only home they know.

The polar bears’ world is melting. Studies show that the polar ice has reduced by 9.8% every 10 years【5】1978. Now about 20,000 to 25,000 polar bears live in the Arctic. Polar bears depend on the sea ice for their【6】(survive). “The sea ice is more than just this platform that the bears walk over,” says Andrew Derocher,【7】scientist who studies North American polar bear populations. “【8】it, they can’t exist.”

Some melting and refreezing of the polar ice is natural.【9】in a warmer world, these cycles speed up, and bears have less time to hunt. Normally, they have three months in the spring when they gain more weight. The extra fat is used later,【10】the bears are not actively hunting.

【答案】

【1】warmer

【2】they

【3】that

【4】has reduced

【5】survival

【6】a

【7】Without

【8】But

【9】to hunt

【10】when

【解析】本文是一片說明文，說明了在日益溫暖的世界下，北極熊的生存現(xiàn)狀與面臨的危險(xiǎn)�？疾榛局R(shí)點(diǎn)，題目較容易。

【1】考查動(dòng)詞比較級(jí)用法 根據(jù)后文than提示 要用 warmer

【2】考查介詞用法 在很多年中 用for/during

【3】考查動(dòng)詞詞組用法 prepare sb for sth 這里的sb就指北極熊 故填them

【4】考查動(dòng)詞變化形式的用法 危險(xiǎn)使他們受到威脅或者危險(xiǎn)正讓他們受到威脅 故填threatens/is threatening

【5】考查連詞用法 The polar ice has reduced by 9.8% every 10 yearssince 1978. 自從1978年以來，北極冰每十年減少9.8% 而現(xiàn)在完成時(shí)也對(duì)應(yīng)since 故填since

【6】考查動(dòng)詞形式的變換 their后應(yīng)加名詞 故填survival

【7】考查冠詞用法 名詞要么有冠詞要么用復(fù)數(shù)， 而scientist沒用復(fù)數(shù) 故填a

【8】考查文章理解 如果沒有冰，北極熊就無法生存。故填without

【9】 考查連詞用法 Some melting and refreezing of the polar ice is natural 與these cycles speed up，and bears have less time to hunt 這兩句話是轉(zhuǎn)折關(guān)系 故填But

【10】 考查連詞用法 當(dāng)北極熊不積極捕獵時(shí)，多余的脂肪就會(huì)在之后使用。故填when

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