单项选择题

Some warm-blooded animals ______ hibernate.

A．need not
B．does not need
C．not need
D．do not need
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单项选择题
Mary （） in bed all day because she had a fever.

A．lay
B．has laid
C．has lain
D．laid
单项选择题
______ he come, what ______ you say to him
A．If, will
B．Should, would
C．When, would
D．Would, do
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