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 —What’sbehindthedoor?—Thereisadog      behindit.A.tosi...

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問題詳情:

 —What’sbehindthedoor?—Thereisadog      behindit.A.tosi...

 — What’s behind the door?

— There is a dog       behind it.

A. to sit          B. sit              C. sat           D. sitting

【回答】

D

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題型:選擇題