The number of foreign students attending Chinese universities ________ rising steadily sin

The number of foreign students attending Chinese universities ________ rising steadily since1990.  

A. is                B. are                C. has been          D. have been  

 

答案

 

本题考查主谓一致和时态,主语是 the number故谓语动词用单数,又因时间状语是since 1997所以用完成时态。

 

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