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-Did you attend your son's graduation ceremony yesterday? -I , but I had to go t

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-Did you attend your son's graduation ceremony yesterday? -I , but I had to go t

-Did you attend your son's graduation ceremony yesterday?

-I ________, but I had to go to an important meeting.

[]

A.used to

B.ought to

C.must have

D.should have

试题答案

答案:D