They didn't know who___it Adesign Bis designing Cdesigned Dw

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/21 21:42:01

They didn't know who___it Adesign Bis designing Cdesigned Dwas designed 请说明理由!

C
如果选A,要用动词单数第三人称形式,因为这里的who没指定是谁,是单数的意味,所以动词要用单数第三人称,加上主句是过去式,从句一般不用现在时态,除非从句说明的是一个真理.所以B也不对,这里用现在进行时,更加错误.D语法有很大的问题,这里选D,意思是,他们不知道谁被设计它.多好笑,对吧!
所以选C,主句过去式,从句也用一般过去式.

They didn't know who___it Adesign Bis designing Cdesigned Dw didn't they know the apponited time They didn't know _____their holiday? i didn't know they would go to Japan they even didn't know who you were.how______they I didn’t know how would they go to london. 1 They didn't know why she _____ the glasses . 改错：They didn't know where the mouse from. I didn't know when they （） for beijing They didn't know Spanish,and the waiter____know English newcomers walked round and round.They didn't know _______ I didn’t know