单项选择题

A．Giving a lecture.
B．Discussing political science.
C．Working on a science problem.
D．Reading twentieth century literature.
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单项选择题
A．Because no other form of exercise uses so many muscles in the body so fully.B．Because no other form of exercise provides so much pleasure.C．Because no other form of exercise is so popular.D．Because no other form of exercise is so competitive.
A．Because no other form of exercise uses so many muscles in the body so fully.
B．Because no other form of exercise provides so much pleasure.
C．Because no other form of exercise is so popular.
D．Because no other form of exercise is so competitive.
单项选择题
A．Presses may get clogged with ink.B．Papers get smudged with old ink.C．Reporters prefer the standard method.D．Machines may need to be oiled daily.
A．Presses may get clogged with ink.
B．Papers get smudged with old ink.
C．Reporters prefer the standard method.
D．Machines may need to be oiled daily.
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