单项选择题

--Must I turn off the light when I leave--No, ______.

A． you mustn't
B． you can't
C． you needn't
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单项选择题
Sometimes we can see ______ stars in the sky at night.
A． thousand of
B． thousands of
C． thousand
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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