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【题目】Thanks to Dr.Yuan Longping,the output of rice________steadily in China in the past few years.

A. increased B. has been increasing

C. is increasing D. increases

【答案】B

【解析】考查时态。句意:多亏了袁隆平博士,在过去的几年里,中国的稻米产量一直在稳步地增长。根据句意可知,稻米产量在过去几年里一直在增长,并且有可能继续增长。应用现在完成进行时。故答案为B。

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