单项选择题

This problem is too hard for me to ______.

A．work at
B．work on
C．work out
D．work in
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单项选择题
Children who are over--protected (过分保护) by their parents may become ______.
A．hurt
B．damaged
C．spoiled
D．harmed
单项选择题
I suggested that a meeting ______ at some other time.
A．holds
B．is holding
C．be held
D．hold
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