单项选择题

This is one of the longest bridges that ______ on this river.

A．is ever built
B．have ever been built
C．was ever built
D．has ever been built
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I prefer ______ a term paper ______ an examination.
A．writing, to take
B．to write, to take
C．writing, to taking
D．writing, than taking
单项选择题
Not until the policeman ______ to me to stop did I realized that I drove too fast.
A．explained
B．told
C．said
D．signed
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