单项选择题

Not only ______ polluted, but ______ crowded.

A．was the city, were the streets
B．the city was, the streets were
C．was the city, the streets were
D．the city was, the streets were
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单项选择题
The room ______ often cleaned by the students.
A．will be
B．has
C．is
D．was
单项选择题
She is ______ , but her husband is ______.
A．waking, asleep
B．wake, asleep
C．awake, sleep
D．awake, asleep
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