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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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
Why do you want a new job ______ you've got such a good one already
A) that
B) where
C) which
D) when
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