问题
选择题
It's nice to see you again. What _____ since we last met? [ ]
A. have you done
B. had you done
C. have you been doing
D. did you do
答案
答案：C
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It's nice to see you again. What _____ since we last met? [ ]
A. have you done
B. had you done
C. have you been doing
D. did you do
答案：C