单项选择题

Hearing problems may be alleviated by changes in diet and exercise habits．（）

A．removed
B．cured
C．treated
D．lessened

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单项选择题
He will consolidate his power．（）

A．strengthen
B．win
C．abandon
D．unite
单项选择题
Many scientists have been probing psychological problems（）

A．solving
B．exploring
C．settling
D．handling
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