单项选择题

Noise pollution generally receives less attention than ______ air pollution.

A．does
B．it does
C．receives
D．it does over
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单项选择题
Here are some books by Agatha Christie. You can read ______ you like.
A．whichever one
B．whose
C．whatever one
D．what
单项选择题
Marge's bedroom was in a ______ , with books and paper covering every possible surface.
A．litter
B．mess
C．rubbish
D．disorder
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