单项选择题

The writer was so absorbed______his job that he did not notice me enter the room.

A．on
B．of
C．in
D．at
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单项选择题
It is requested that every student______a paper on the rapid development of industry.
A．writes
B．wrote
C．writing
D．write
单项选择题
In my opinion, all people should be______for the things they do.
A．popular
B．responsible
C．respectful
D．anxious
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