问题
选择题
—Are Jack and Mary your friends?
—________. [ ]
A. Yes, they are
B. They are
C. No, they not
D. They aren’t
答案
答案：A
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—Are Jack and Mary your friends?
—________. [ ]
A. Yes, they are
B. They are
C. No, they not
D. They aren’t
答案：A