They never been opened.这句话正确吗?如果错了怎么改?

They have never been opened.为什么不可以是They never have been opened. They have never been to hong kong改为肯定句 They have never been to Bei Jing 怎么改反意疑问句? They have never been to New York,_____? the children say that they have never been to london.对（that they have never been to london)提问 they have never been to the great wall对never提问 ______ ________ _________have they ever been tothe great wall? They've never been to Beijing.(改为反意疑问句） They've never been to Beijing,_____ ______? they have never been to the great wall对never提问 ______ ________ _________have they ever been tothe great wall? They have never been there __.A .and never will B.and never will goC.and will never have been D.and will never go there 请问这句不能选A或B的理由,为什么选CWere it not for the adoption of the open policy,things ______ they are today.a.would never be b.could have been c.would never have been d.didn’t have have never been to the great wall对never提问 ______ ________ _________have they ev have never been to the great wall对never提问 ______ ________ _________have they ever been to they shoud never do what they have been doing for many Were it not for the adoption of the open policy,things ______ they are today.A would never be B would never have been 为什么不能选A,有today难道不是错综时间虚拟条件句吗?还有一题,也类似：35.If we had known that she had plan the children says that they have never been to new york( 对划线部分提问)划线部分that they have never been to new york They wrote letters last Sunday,____ ____?Don't open the door,___ ___?Let's go to school ,____ ____?Listen to me,____ ____?There's little water in the river,____ ____?The little girl can hardly read,_____ _____?He has never been in Japan,_____ _____? They are looking forward to seeing something that has never been heard of They have never been to Australia before.对方说 So have we 还是Neither have we