单项选择题

We really enjoyed ____________ on the farm.

A．work
B．to work
C．working
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单项选择题
Mr. Young and Miss Liu ____________ from America.
A．both are
B．are both
C．are all
单项选择题
____________ ! May I borrow your knife
A．Excuse me
B．I'm sorry
C．Let me say
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