单项选择题

Cotton production has been ________ the decline these years.

A．down
B．on
C．at
D．under
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单项选择题
There is a ________ difference in meaning between the words surroundings and environment.
A．gentle
B．subtle
C．feeble
D．humble
单项选择题
Miners feel they are ________ rewarded for the dangerous work they do.
A．annually
B．decidedly
C．excessively
D．inadequately
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