单项选择题

I believe he ______an accident, otherwise he would have arrived on time.

A．would have had
B．could have had
C．should have had
D．must have had
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单项选择题
After saying that, he ______ the door quickly.
A．made up
B．made for
C．made out
D．made
单项选择题
Had the weather been good, the children ______ out for a walk.
A．had gone
B．could have gone
C．would go
D．went
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