It's impossible for a child to do so much work within a short period of time,______?
a) isn't it b) is it c) has it d) hasn't it
为什么是a?不是有impossible吗?
人气：154 ℃ 时间：2020-05-11 02:56:43
解答
a) isn't it
如果是通过加否定前缀表否定的,作肯定句看：
再如：
It is unimportant,isn't it?
比较：
It is not important,is it?
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