单项选择题

______ to help was a great encouragement to us.

A．Their coming
B．Their came
C．They coming
D．They come
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单项选择题
I ______ you any more, because it's highly confidential.
A．dare not to tell
B．dare not tell
C．don't dare telled
D．dare not telling
单项选择题
If you had ______ the doctor's advice, you would have recovered already.
A．followed
B．listened
C．heard
D．made
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