问题
选择题
—Is this the _________ photo?
—Yes, it's theirs.[ ]
A. twin(双胞胎)
B. twin's
C. twins'
D. twins
答案
答案：C
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—Is this the _________ photo?
—Yes, it's theirs.[ ]
A. twin(双胞胎)
B. twin's
C. twins'
D. twins
答案：C