单项选择题

______ the other boys and girls were playing on the playground, she alone remained in the classroom reading.

A. Now that B. Since C. While D. As
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Mr. Martin is too busy to spare any time ______ Sunday afternoon.
A. except on
B. except for
C. unless on
D. only in
单项选择题
We have all learnt a lot from the ______.
A. three month’s training course
B. three-month-training course
C. three-month training course
D. three-month’s training course
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