单项选择题

If John leaves, we'll be in trouble, ______

A．if he
B．does he
C．won't we
D．don't we
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单项选择题
—Who has been planning the dance —Everyone in the class ______.
A．is
B．has
C．have
D．are
单项选择题
Hardly ______ down ______ the phone rang.
A．had she sat; when
B．she sat; when
C．had she sat; than
D．she had sat; than
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