题目内容
The number of foreign students attending Chinese universities ______ rising step by step since 1999.
A. is B. are C. has been D. have been
C
【解析】
试题分析:考查动词时态。since 1999 since自从---以来,和现在完成时态连用;The number of---作主语后面的谓语动词用单数,故选C
考点:考查动词时态。
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