问题
选择题
Listen! His family must be quarrelling, _____? [ ]
A. mustn't it
B. isn't it
C. aren't they
D. needn't they
答案
答案：C
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Listen! His family must be quarrelling, _____? [ ]
A. mustn't it
B. isn't it
C. aren't they
D. needn't they
答案：C