问题
选择题
—When _____ you _____ the Great Wall?
—Last month.[ ]
A. do; visit
B. will; visit
C. did; visit
D. are; visiting
答案
答案：C
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—When _____ you _____ the Great Wall?
—Last month.[ ]
A. do; visit
B. will; visit
C. did; visit
D. are; visiting
答案：C