单项选择题

Jack was reading a book in the sitting-room （）the phone rang.

A．when
B．since
C．while

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单项选择题
It was said that the meeting （）more than 4 hours.

A．spent
B．lasted
C．opened
单项选择题
I am not （）good as my brother at English

A．so
B．too
C．such
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