单项选择题

People learn better through TV than through radio because ______.

A．TV sets are bigger than radios
B．people can not only hear but also watch
C．without ,TV people can't open their eyes
D．it's easier to turn on TV than to turn on radio

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单项选择题

Machines will do ______ people.

A．most of the work instead of
B．some of the work instead of
C．as much work as
D．as little work as

单项选择题

Tom and Fred are talking about ______.

A．their students
B．their life in the past
C．something in the late 21st century
D．some interesting news