问题

If you want to talk to your teacher, you should _ _first.

A:has gone in
B:Has been in
C:has gone to
D:has been to;

正确答案是：

同类题型

We are living in an age ______ many things are done on computers [ ]

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Excuse me, sir. Is the swimming poolopen all day—.Only from 6:00 pm to 10:00 pm.

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