单项选择题

I ______ for the bus for the past 20 minutes and still it has not come.

A．wait
B．waited
C．have waited
D．have been waiting
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单项选择题
Have another cup of coffee,______
A．won't you
B．will you
C．have you
D．haven't you
单项选择题
I stopped ______ in London when I realised it was time for me to move on.
A．live
B．lived
C．to live
D．living
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