单项选择题

He has been working as an engineer ______graduation.

A) while
B) as
C) since
D) which
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单项选择题
We must work and rest ______to our timetable.
A) accord
B) according
C) accorded
D) to accord
单项选择题
It's very cold outside, and you should ______your coat to keep warm.
A) put on
B) take off
C) get along
D) carry on
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