题目内容
( )4. I think we should _________ the invitation.
A. reply B. replying to
C. reply to D. to reply
4. C reply to…意为"回复.. "，to不能省略。"should +动词原形"意为"应该做某事"。
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题目内容
( )4. I think we should _________ the invitation.
A. reply B. replying to
C. reply to D. to reply
4. C reply to…意为"回复.. "，to不能省略。"should +动词原形"意为"应该做某事"。