单项选择题

All I'm trying to do is to （）why your condition has not improved.

A．look for
B．find out
C．search for
D．get in

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单项选择题
Not long ago, a person whom I know very well was （）an accident.

A．related to
B．involved in
C．included in
D．subjected to
单项选择题
The driving instructor told me to （）at the department store.

A．pull round
B．pull away
C．pull apart
D．pull up
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