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

题目简介

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

题目详情

.Your son has kept _________ for two hours. You’d better ask him to have a rest.
A.studyB.studiedC.to studyD. studying
题型:单选题难度:中档来源:不详

答案

D
keep doing 保持不间断地做某事
keep to do  keep要求 -ing, 没有 to do 形式
故选D.

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