The number of foreign students attending Chinese universities ________ rising steadily since1990.
A. is B. are C. has been D. have been
The number of foreign students attending Chinese universities ________ rising steadily since1990.
A. is B. are C. has been D. have been
C
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。