An average of 130000 Chinese abroad for studies every year over the past few years boost

问题补充：

An average of 130000 Chinese abroad for studies every year over the past few years, boosting exchanges in the educational fields

A. was going

B. have been going

C. has been going

D. are going

答案：

A. was going

(答案→)B. have been going

C. has been going

D. are going

解析：考查动词的时态。根据本句中的时间状语every year over the past few years“在过去的几年中，每年”可知，要用现在完成时态。现在完成进行时，现在完成进行时表示动作的持续性和延续性。同时前面的主语是130000 Chinese可知，用复数。句意：在过去几年中，每年平均有130，000人出国留学，促进教育领域的交流。

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