单项选择题

I lay on the bed, ______ to the radio.

A．listen
B．hear
C．listening
D．hearing
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单项选择题
Her ability has been doubtful after a number of ______.
A．failures
B．successes
C．fails
D．losers
单项选择题
Do you mind my ______ here
A．smoke
B．smokes
C．smoking
D．smoker
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