They had to stay at home because of the heavy rain,_________?
A.hadn't they B.didn't they C.did they D.had they
我选了A,但是答案是B,为什么呢?
人气：416 ℃ 时间：2019-08-19 01:24:08
解答
B对,前肯后否.
因为had to是 have to 过去时,其否定句要加助动词didN‘t ,反意疑问句也一样
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