问英语选择题
it is impossible for a child to do so much work within a short period of time,________? a.is it b.has it c.hastn't it d.isn't it 到底是选择哪个答案?
d.isn't it 主谓语是it is,反意疑问句就是isn't it 用它的否定形式
d.isn't it 不看其它的,主谓语是it is,反意疑问句就是isn't it
选 D isn't it
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