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
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单项选择题
______the children to bed, she began to correct the students' exercises.
A) Sending
B) Being sent
C) Sent
D) Having sent
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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