单项选择题

Joan has all the packages ______ and posted to Mr. Smith.

A．done up
B．done with
C．done out
D．done over
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单项选择题
______ for a person who has more problems than you do.
A．Not try to work
B．Try not to work
C．Trying not to work
D．Not trying to work
单项选择题
Children tend to rely on ______ school friends to keep in touch with schoolwork.
A．concern
B．concerning
C．concerned
D．to concern
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