单项选择题

They were just going out（）it began to rain.

A．when
B．as
C．while
D．and

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单项选择题
So much（）worry about her Son（）she can't sleep at night.

A．she does...that
B．does she...and
C．she does...and
D．does she...that
单项选择题
Tom（）have met us three times last year, but' the first two meetings were canceled.

A．will
B．should
C．had
D．must
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