对括号里的提问1.The students in Class 1,Grade 7 will go on a trip to Beijing (by train)_____ _______the students in Class 1,Grade 7 will go on a trip to Beijing 2.The children usually knock on (their neighbours'doors at Halloween.)_____ _______do the children usually knock _______at Halloween?

What do; What doors; on应该是这样的

1.The students in Class 1,Grade 7 will go on a trip to Beijing (by train)
{How do} the students in Class 1,Grade 7 will go on a trip to Beijing ?
2.The children usually knock on (their neighbours'doors at Halloween.)
{Which doors} do the children usually knock {on} at Halloween?

How do
Whose door on

By what
Whose door on

1.How will
2.Whose door,on

By what by train是方式状语
whose door;on 第二题应该是对their neighbour's划线提问，才用whose提问。