单项选择题

This is a long （）-- roughly 13 miles down a beautiful valley to the little church below.

A．terrain
B．descent
C．degeneration
D．tumble

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单项选择题

The doctors （）the newly approved drug into the patient when he was critically ill.

A．injected
B．ejected
C．projected
D．subjected

单项选择题

Apart from philosophical and legal reasons for respecting patients' wishes, there are several practical reasons why doctors should （）to involve patients in their own medical care decisions.

A．enforce
B．endow
C．endeavor
D．enhance

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