问题
选择题
Your grandpa had lived here for 50 years before he moved to London, _____? [ ]
A. was it
B. did he
C. had he
D. hadn't he
答案
答案：D
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Your grandpa had lived here for 50 years before he moved to London, _____? [ ]
A. was it
B. did he
C. had he
D. hadn't he
答案：D