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
To ______ the truth, I don't like him at all.
A．remark
B．speak
C．talk
D．tell
单项选择题
How did it come _____ that you made a lot of mistakes in your homework
A．about
B．after
C．with
D．to
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