IamsorrythatIhavekeptyou
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问题详情:
I am sorry that I have kept you ________ me so long.
A ing B. to wait C ing for D wait for
【回答】
C 点拨:keep sb. doing sth.使某人一直做某事。wait 为不及物动词,接名词时需带介词for,故选C。
知识点:动词和动词短语
题型:选择题
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