单项选择题

When I entered the classroom, I found the students（）the questions in groups.

A. to discuss
B. discuss
C. discussed
D. discussing

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单项选择题
Please write your name in the（）space at the top of the page.

A. empty
B. vacant
C. blank
D. hollow
单项选择题
After I（）the work of the department, I was transferred to another one.

A. learnt
B. had learnt
C. would learn
D. was learning
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