单项选择题

I don't doubt ______ he will come on time.

A．whether
B．which
C．what
D．that
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单项选择题
He ______ another career but, at the time, he didn't have enough money to attend graduate school.
A．might have chosen
B．might choose
C．had to choose
D．must have chosen
单项选择题
Most trains _______ long distances have a dining car and a club car where refreshments are served.
A．to go
B．to be going
C．that goes
D．going
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