单项选择题

He is ______ duty today.

A. at
B. in
C. on
D. for
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单项选择题
They’ve optimistic about new CEO Gil Emilio’s efforts to turn ______ the company.
A. around
B. about
C. out
D. in
单项选择题
Should he have any consideration ______ the students
A. in
B. on
C. for
D. about
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