单项选择题

"I usually sleep with the windows closed at night, even in summer.""You can never be ______ careful."

A．very
B．much
C．too
D．so
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单项选择题
What makes her so unhappy ______one of her favorite books.
A．Because she lost
B．Because of her losing
C．She lost
D．Her losing
单项选择题
Which do you want, the red one or the black one ______. How about showing me another
A．Either
B．Both
C．Neither
D．None
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