单项选择题

Don't ______ the camera ______ unless you are sure you can put it together.

A．take...off
B．work...out
C．set...off
D．take...apart
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单项选择题
At the beginning of this term, our history professor ______ a list of books for us to read.
A．passed on
B．fished out
C．handed in
D．made out
单项选择题
When he was set free after twenty years in prison he was amazed ______ the changes he found.
A．at
B．in
C．on
D．to
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