单项选择题

—What's the matter Why ______ —The signal is against us.

A．the train stopping
B．does the train stop
C．is the train stopping
D．did the train stop
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单项选择题
He said that there was nothing to be ______.
A．ashamed
B．ashamed in
C．ashamed of
D．ashamed at
单项选择题
If John ______ tomorrow, he will work in the garden.
A．comes
B．came
C．is coming
D．will come
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