Your son has kept for two hours. You’d better ask him to have a rest.A. studyB. studiedC.

发布时间：2020-08-20 08:04:55

Your son has kept      for two hours. You’d better ask him to have a rest.
A. study
B. studied
C. to study
Dstudying

网友回答

A. study
B. studied
C. to study
(答案→)D. studying
解析：keep doing sth表示不断地做某事，故本题选D。
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