单项选择题

The parents were shocked by __________ news that their son needed __________ operation on his knee.

A．a;/
B．the; /
C．the; an
D．a; an
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单项选择题
__________ we have enough evidence. we can’t win the case.
A．Once
B．As long as
C．Unless
D．Since
单项选择题
John incited about 40 people to his wedding, most of __________ are family members.
A．them
B．that
C．which
D．whom
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