单项选择题

A．It has just begun snowing.
B．She doesn’t like snowy days.
C．It has been snowing for some time.
D．She doesn’t think it’s going to snow.
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单项选择题
A．The concept of the family as a social unit.B．The attitudes to birth control.C．The attitudes to religion.D．The ideas of authority and tradition.
A．The concept of "the family" as a social unit.
B．The attitudes to birth control.
C．The attitudes to religion.
D．The ideas of authority and tradition.
单项选择题
A．Because the old one could not transfer signals clearly.B．Because the old one could only send two messages along the same line simultaneously.C．Because the old one could not send messages quickly enough.D．Because the old one could not send more than one message at the same tim
A．Because the old one could not transfer signals clearly.
B．Because the old one could only send two messages along the same line simultaneously.
C．Because the old one could not send messages quickly enough.
D．Because the old one could not send more than one message at the same tim
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