Because of climate change, the ice that polar bears depend on for survival

题型：不详难度：来源：

Because of climate change, the ice that polar bears depend on for survival .

A．are slowly disappearing

B．is slowly disappearing

C．are slowly disappeared

D．have slowly disappeared

答案

解析

略

举一反三

My goodness. How lucky we are! If there had been places for us on that aero-plane, we ________dead now.

A．will be

B．would be

C．would have been

D．had been

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10. By the middle of the 21st century , the vast majority of the world’s population ________ in cities rather than in the country.

A．are living

B．will be living

C．have lived

D．will have lived

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14. Many new games are designed on the computers all the time; people of all ages ______ these games.

A．are playing

B．had played

C．have been playing

D．Play

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44. He must be getting thin, for his trousers _____ badly like a flag in the wind.

A．are flowing

B．flow

C．flowed

D．have flowed

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171. We"ll hold a sports meet in our school if it __________ next weekend.

A．doesn"t rain

B．won"t rain

C．rained

D．is going to rain

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