单项选择题

Such electronic devices（）are used in a radio set are also found in a computer.

A．which
B．that
C．what
D．as

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Look at those students in the reading room. Some are reading newspapers;（）are reading magazines.

A．other
B．the other
C．others
D．the others
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Everybody says he is a（）boy.

A．promised
B．promising
C．to promise
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