单项选择题

Taking time to clear your mind can improve your spirits-and your ().

A. immunity
B. community
C. unity
D. solidarity

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单项选择题
Oddly enough, he ignored decades of () research in favor of some strange mythology he came across.

A. contrary
B. contradictory
C. conditional
D. clinical
单项选择题
High blood pressure is a risk factor that should often be ().

A. operated
B. conducted
C. performed
D. monitored
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