The number of foreign students attending Chinese universities rising steadily since 2009.
A. is
B. are
C. has been
D. have been
网友回答
A. is
B. are
(答案→)C. has been
D. have been
解析：考查时态和主谓一致。本题的主语是the number of……的数量。做主语时，谓语动词用单数。句子的时间状语是since 2009，故使用现在完成时。故C正确。