问题
选择题
— How long do you think it is _______ he took up the job?
— Half a year at least. [ ]
A. when
B. before
C. that
D. since
答案
答案：D
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— How long do you think it is _______ he took up the job?
— Half a year at least. [ ]
A. when
B. before
C. that
D. since
答案：D