问题
选择题
Grapes usually have seeds in the middle, _____?[ ]
A. aren't they
B. isn't it
C. don't they
D. isn't it
答案
答案：C
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Grapes usually have seeds in the middle, _____?[ ]
A. aren't they
B. isn't it
C. don't they
D. isn't it
答案：C