单项选择题

A．when
B．since
C．while
D．where
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单项选择题
A．sidedB．linedC．envelopedD．hounded
A．sided
B．lined
C．enveloped
D．hounded
单项选择题
A．no less thanB．no more thanC．less thanD．fewer than
A．no less than
B．no more than
C．less than
D．fewer than
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