问题
选择题
You have been to Beijing. How long _______ you _______ there/ [ ]
A. did…stay
B. have…stayed
C. do…stay
D. will…
答案
答案：A
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You have been to Beijing. How long _______ you _______ there/ [ ]
A. did…stay
B. have…stayed
C. do…stay
D. will…
答案：A