问题
选择题
— When __________ you __________ the bike?
— Last year.[ ]
A. have, bought (buy的过去式)
B. do, buy
C. did, buy
答案
答案：C
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— When __________ you __________ the bike?
— Last year.[ ]
A. have, bought (buy的过去式)
B. do, buy
C. did, buy
答案：C