【題目】The 2013 population investigation shows one in four people in Jiangsu will be over 65 and the number of over-85 people ________ by 2030.

A. have doubledB. will be doubled

C. will have doubledD. will double

【答案】C

【解析】考查時態(tài)。句意：2013年人口調(diào)查表明在江蘇省四分之一的人在2030年超過65歲，并且超過85歲的人的數(shù)量會翻倍。根據(jù)時間狀語by 2030可知，應(yīng)用將來完成時。

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