单项选择题

In regard to the patient's sensitive skin, the doctor advised him to limit his ________to the sun.

A．expansion
B．exhibition
C．extension
D．exposure
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单项选择题
The increase in student numbers ________many problems for the university.
A．forces
B．presses
C．provides
D．poses
单项选择题
There are many arguments ________smoking in public places.
A．for
B．from
C．against
D．towards
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