单项选择题

It's quite early. We ______ worry about the time.

A．mustn't
B．may not
C．needn't
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单项选择题
We were asked to write a ______ in an hour.
A．two-hundred-word paper
B．two-hundred-words paper
C．two-hundreds-words paper
单项选择题
--How soon will you be able to finish your homework -- ______.
A．After two hours.
B．In two hours
C．Two hours later
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