问题
选择题
I’m sorry to keep you _______ for almost two hours.
A．wait
B．to wait
C．waiting
D．waited
答案
答案：C
使某人不断的做某事通常可写成keep sb doing sth，故选C。
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I’m sorry to keep you _______ for almost two hours.
A．wait
B．to wait
C．waiting
D．waited
答案：C
使某人不断的做某事通常可写成keep sb doing sth，故选C。