单项选择题

No sooner had we reached the top of the hill ______ we all sat down.

A．when
B．then
C．than
D．until
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单项选择题
Kate did not have time to go to the cinema last night because she was busy ______ for her exam.
A．to preparing
B．to be prepared
C．preparing
D．being prepared
单项选择题
______ we have finished our lesson, we shall start to do some revision work.
A．For now
B．Now that
C．Ever since
D．By now
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