单项选择题

While watching television, ______.

A．the telephone rang
B．we heard the telephone ring
C．we heard the telephone rang
D．the telephone was rung
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单项选择题
Some people feel that television should give less ______ to sport.
A．programs
B．coverage
C．concern
D．involvement
单项选择题
To test his theory, the chemist ______ an experiment.
A．set up
B．set out
C．set forth
D．set in
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