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
He took down a square green bottle, （）he poured into a dish.

A．its content
B．which content
C．the content of which
D．the content of that
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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