单项选择题

The classroom needs ______.

A．clean
B．B ) to clean
C．cleaning
D．being cleaned
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单项选择题
Some people get used ______ and it is hard for them to stop.
A．to smoke
B．to smoking
C．smoking
D．for smoking
单项选择题
Yesterday when I was walking on the street, I ______ to see an old friend of mine.
A．managed
B．happened
C．settled
D．occurred
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