单项选择题

Mr. Smith insisted that he（）the work all by himself, but nobody believed him.

A．had done
B．have done
C．did
D．do

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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
D．promise
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