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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

 

【答案】

B

【解析】

試題分析:考查時態。根據本句的時間狀語by the middle of the 21st century說明是一個將來時。陳述的是在將來的這段時間里所發生的事情,所以使用將來進行時。句意:到21世紀中葉,大部分的人口都將生活在城里而不是在鄉下。故B正確。

考點:考查時態

點評:時態題的考查關鍵是抓住句中的時間狀語。要根據時間狀語來選擇合適的時態,在平時的學習中要注意積累有關時態的用法和各種時態的特殊之處。

 

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