按要求完成句子.We parents having dinner when someone was knocking at the door.(对划线部分提问）
划线部分是：having dinner
- - - - when someonce was knocking at the door?
人气：154 ℃ 时间：2020-01-29 03:52:12
解答
你的题目少了东西,应该还有个were,对做某事提问,应该用疑问词what,剩余部分改为一般疑问句were your parents加在what后即可,所以答案是What were your parents doing,不可缩写,缩写过去式就不存在了,你的题目是不是抄错了?
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