they cant have come back from the exhibition show yet 反义疑问

they cant have come back from the exhibition show yet 反义疑问
they cant have come back from the exhibition show yet,反义疑问
要你选反义疑问,一个是have they 另一个是do they ,选哪个?为什么?如果是have they的话神恶魔时候用do they?
is this theatre -----the phantom of the opera was put on for the first time?答案是填where,但我觉得是the one,不是缺先行词吗?
.i am sure she would do____thing herself.填no such还是no such 为什么?
第二个说用the one that？为什么要加that？它不是在定从的宾语位置上嘛？还是因为后面的the first time？
第一个是they can not.........反义疑问