单项选择题

______ so many efforts in such a short period of time.

A. Never have any student made

B. Never have a student made
C. Never has any student made

D. Never did a student make
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He is the manager of the Human Resources Department ______ I must talk to. A) what C) whom B) which D) who
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The movie star ______ with your sister, didn't he
A. used to dance

B. used to dancing
C. was used to dance
D. was used to dancing
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