they didn’t discover until the happened to enter the back roomThey didn't discover until they happened to enter the back room_____someone had stolen the priceless painting.A that B what C which D when 选A 怎么理解

they didn’t discover until the happened to enter the back roomThey didn't discover until they happened to enter the back room_____someone had stolen the priceless painting.A that B what C which D when 选A 怎么理解 they didn't know how they could do it.同义句they didn't know --------- --------- -----------it. they were ( )because they didn 't havethey were ( )because they didn 't have lunch They didn't c _____ their mind. they didn't go swimming___(too) They both didn't do their best. nobody knew it ,didn't they.改错 but they didn't notice rt They after running yesterday afternoon,didn't they?They 什么什么 after running yesterday afternoon，didn't they？ they must have seen the film last week,didn't they?为什么要用didn't they呢?they must have seen the film last week,didn't they?为什么要用didn't they呢? (They must have been there yesterday ,______they?)能用weren't they 还是didn't they? They said they didn't need any help.同义句They said they [ ] [ ]help 选择适当的单词形式填空.1,They were(填)bythis(填)news..(astonish,astonishing,astonished) 2.Lin Qiaozhiwas a(填)inwome,sillnesses(specialize,specialist)3.With this(填),he thought of anotherb plan .(discovery,discover).4,He didn,t think h t's a matter of time before they will discover John has left.此句(出自人教版高一下)是否有误? people didn't t____(有） TVs and they didn't go to the cinema. They didn't know Spanish,and the waiter____know EnglishA.didn'tB.donitC.doesn'tD.isn't they went to the cinema ,____?A.didn't they B.do they C.did they D.don't they discover