单项选择题

He didn't go to school ______ he is ill.

A． when
B． as
C． while
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单项选择题
Hurry up, ______ we'll miss the bus.
A． and
B． or
C． but
单项选择题
— ______ do you usually go to the cinema— Once a week.
A． How long
B． How much
C． How often
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