问题
选择题
一Is this your bicycle, David?
一No, it's not_____. It's Helen's. [ ]
A. his
B. yours
C. mine
D. hers
答案
答案：C
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一Is this your bicycle, David?
一No, it's not_____. It's Helen's. [ ]
A. his
B. yours
C. mine
D. hers
答案：C
，ANB7°，上前牙前突，牙列无拥挤。