单项选择题

You'll run ______ trouble if you don't take care.

A．down
B．at
C．across
D．into
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单项选择题
______ could solve that problem. It's so easy.
A．Someone
B．None
C．No one
D．Anyone
单项选择题
The door was ______ and I could not see who she was talking to.
A．shut
B．shutted
C．shutting
D．being shut
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