9、―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
科目：高中英語 來源： 題型：
―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
科目：高中英語 來源：2009年大連市高三第二次模擬試卷英語 題型：014
－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
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