【題目】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】考查時(shí)態(tài)。句意：多虧了袁隆平博士，在過去的幾年里，中國的稻米產(chǎn)量一直在穩(wěn)步地增長。根據(jù)句意可知，稻米產(chǎn)量在過去幾年里一直在增長，并且有可能繼續(xù)增長。應(yīng)用現(xiàn)在完成進(jìn)行時(shí)。故答案為B。

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