单项选择题

The waste pipe is blocked; try sluicing it out with hot water.

A. rushing
B. brushing
C. crushing
D. flushing
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单项选择题
Many scientists have been probing psychological problems.
A. solving
B. exploring
C. settling
D. handling
单项选择题
His actions do not match his words.
A. respond to
B. consist to
C. correspond to
D. accord to
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