问题
选择题
— My parents have been to Hongkong.
— Really? When ______ there? [ ]
A. have they gone
B. have they been
C. did they go
D. will they go
答案
答案：C
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— My parents have been to Hongkong.
— Really? When ______ there? [ ]
A. have they gone
B. have they been
C. did they go
D. will they go
答案：C