_______ idea is it?It's Tom's idea.
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Mary writes a work report _______ a month.
A. one
B. two
C. three times
_______ did you buy that suit from?
A. Where
B. What
Anna _______ visit Professor Black yesterday.
A. didn't
B. doesn't
C. don't
在HBuild中,快速保存文件的快捷键是()?
A. Ctrl+S
B. F12
C. F2
D. Ctrl+C