Question

Polar bears are suffering in a1. (warm) world than ever before.

Polar bears live in environments too cold for most animals. For much of the year, 2.live and hunt on the frozen Arctic sea ice. Nature has prepared them for the cold conditions. But nothing has prepared the bears for the danger threatening the only home3.they know.

The polar bears’ world is melting. Studies show that the polar ice4.(reduce) by 9.8% every 10 years since 1978. Now about 20,000 to 25,000 polar bears live in the Arctic. Polar bears depend on the sea ice for their5. (survive). “The sea ice is more than just this platform that the bears walk over.” says Andrew Derocher, 6.scientist who studies North American polar bear populations. “7.it, they can’t exist.”

Some melting and refreezing of the polar ice is natural. 8.in a warmer world, these cycles speed up, and bears have less time9.(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.

Answer 1

1.warmer

2.they

3.that

4.has reduced

5.survival

6.a

7.Without

8.But

9.to hunt

10.when

【解析】

試題解析：考察單詞的正確形式及單詞拼寫，首先要結(jié)合前后文分析空白處的語法結(jié)構，然后根據(jù)括號中的詞進行變形。沒有給定詞的時候就需要根據(jù)前后文的意思進行推斷分析，找到既合語法又符合意思的單詞。

1. 考察比較級的用法。根據(jù)詞性，空白處需要一個形容詞性的詞；其次根據(jù)后文中than可知空白處需要形容詞的比較級，warm表示溫暖的，比較級形式為warmer，故填warmer�！癙olar bears are suffering in a (warm) world than ever before”北極熊正在遭受一個比以前更溫暖的環(huán)境。

2. 考察細節(jié)理解題。根據(jù)前后文“Polar bears live in environments too cold for most animals. For much of the year, live and hunt on the frozen Arctic sea ice.”推測句意：北極熊居住的環(huán)境對大多數(shù)動物來說都太冷了，在一年的大多數(shù)時間里，他們居住在北極的冰面上并覓食。故填they。

3. 考察定語從句引導詞。后文they know作home的定語，因為home前有修飾詞the only，故引導詞只能為that，故填that�！癇ut nothing has prepared the bears for the danger threatening the only home they know”句意；但是他們沒有誰也沒有為他們面臨的威脅做準備。

4. reduced 考察完成時態(tài)。根據(jù)前后文“Studies show that the polar ice (reduce) by 9.8% every 10 years since 1978”中since可以推斷主句時態(tài)應為現(xiàn)在完成時態(tài)。故空白處太難has reduced。句意：研究表明，北極的冰自從1978年以來每十年就減少百分之九點八。

5. 考察survive的名詞形式。根據(jù)前后文“Polar bears depend on the sea ice for their (survive)”可知空白處缺乏名詞形式。給出的survive是動詞，意為存活，幸存。名詞形式為survival，意為生存的環(huán)境。故填survival。句意：北極熊依靠海面上的冰作他們的生存環(huán)境。

6. 考察推理判斷題。根據(jù)前后文“says Andrew Derocher, scientist who studies North American polar bear populations”空白處缺乏冠詞。此處表明此人是一個科學家，后文作Andrew Derocher的定語，此時還不是特指，故不能使用定冠詞the，故填a。句意：Andrew Derocher說道，Andrew Derocher是一個研究北美北極熊數(shù)量的科學家。

7. 考察細節(jié)理解題。根據(jù)前后文. “ it, they can’t exist.”前文提到北極熊生存的海面上的冰，而海上的冰正在融化，所以it代指海面上的冰。推測句意：沒有那些冰，他們就不能生存。故填without。

8. 考察推理判斷題。根據(jù)前后文“Some melting and refreezing of the polar ice is natural. in a warmer world, these cycles speed up”空白處缺少連詞，前后文句意：一些北極冰融化再結(jié)冰是很自然的，在一個更溫暖的環(huán)境下，這種循環(huán)加速了�？梢酝茰y這加速對北極熊是不利的，所以空白處應為轉(zhuǎn)折關系。故填but。

9. hunt 考察動詞不定式用法。根據(jù)前后文“these cycles speed up, and bears have less time (hunt)”空白處需要動詞不定式作定語，故填to hunt。句意：這樣的循環(huán)加速了，所以北極熊們覓食的時間變的更少了。

10. 考察細節(jié)理解題。根據(jù)前后文“The extra fat is used later, the bears are not actively hunting”推測句意：當北極熊覓食不那么活躍時，那些多余的脂肪就會被使用。從前文中的when也可知此處應填when與之呼應。

考點：考察科技文閱讀。