问题

You ______ to the meeting this afternoon ifyou have something important to do.
A: has begun
B: had begun
C:had been on
D: has been
B: had begun
C:had been on
D: has been
正确答案是:
同类题型
Were you surprised by the ending of the film? — No, I ______ the book, so I already knew the story
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