单项选择题

It was ______ three o'clock that he left.

A．until
B．until not
C．not until
D．till not
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单项选择题
In her spare time she enjoyed ______ novels or ______ to the park.
A．reading; go
B．to read; going
C．reading; going
D．to read; to go
单项选择题
______ does Mary write to her father Twice a week.
A．How long
B．How often
C．How far
D．How soon
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