单项选择题

A．Because schoolchildren waste time and money on them.
B．Because too many adults spend working hours playing them.
C．Because they can easily be turned into a form of gambling.
D．Because they are becoming a social problem, affecting both adults and children.
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单项选择题
A．Because of the loudness of the sound waves.B．Because of the fear of sea animals.C．Because of the fear of the confusion and harm caused by sound waves.D．Because of the noise of the experiment.
A．Because of the loudness of the sound waves.
B．Because of the fear of sea animals.
C．Because of the fear of the confusion and harm caused by sound waves.
D．Because of the noise of the experiment.
单项选择题
A．It makes one likely to ignore how other things are going on.B．It doesn’t help one lose weight.C．It does harm to one’s health.D．It prevents one from achieving his or her goal.
A．It makes one likely to ignore how other things are going on.
B．It doesn’t help one lose weight.
C．It does harm to one’s health.
D．It prevents one from achieving his or her goal.
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