单项选择题

It was the first time that Mary was late. She ______ up in the traffic.

A．could be held
B．can have been held
C．might have been held
D．might be held
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单项选择题
______ she will come or not depends on the weather.
A．If
B．Whether
C．That
D．As
单项选择题
I have given up trying to convince him; there is no point ______ with him.
A．on arguing
B．in arguing
C．to argue
D．for arguing
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