单项选择题

— ____________ do you go to the cinema—Once a month.

A． How long
B． How often
C． How much
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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． thousands
单项选择题
Mrs. Zhang is a friend of________.
A． John's mother
B． mother of John
C． John's mother's
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