单项选择题

According to the doctors, if there were no ______, they would probably cure the disease.

A．complexities
B．completions
C．compliances
D．complications
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单项选择题
He must have been very depressed when he heard the news, ______
A．mustn't he
B．haven't he
C．wasn't he
D．didn't he
单项选择题
They hoped ______ them.
A．us to go and join
B．that we would go and join
C．for us to go and join
D．our going and joining
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