单项选择题

I saw ______ cars and trucks outside the building at dusk.

A．an amount of
B．numbers of
C．lots of
D．plenty of
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单项选择题
— She must be in the dormitory now. — No, she ______ be there. I saw her in the classroom a minute ago.
A．mustn't
B．can't
C．couldn't
D．wouldn't
单项选择题
______ is considered as female occupation.
A．Dance
B．Dancing
C．Dancer
D．To dance
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