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单项选择题

______, I didn’t know how to use the machine.

[A] At beginning
B. At first
C. At start
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热门试题

单项选择题— Why won’t you go to the movie with me,Betty — Because I______it twice.

[A] saw
B. have seen
C. will see

单项选择题I must first to find a room ______.

A. to live
B. to live in
C. living in