单项选择题

The sudden drop in temperature has greatly ______ the crops.

A．affected
B．effected
C．influenced
D．destroyed
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单项选择题
He's ______ enough to stand all the hardships.
A．tough
B．rough
C．crude
D．hoarse
单项选择题
According to the doctors, if there were no ______, they would probably cure the disease.
A．complexities
B．completions
C．compliances
D．complications
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