Is this factory you want to visit tommorrow.填什么?which that where the one.如果改成the factory答案又是其他的什么?Is this factory ( ) you want to visit tommorrow

Is this factory you want to visit tommorrow.填什么?which that where the one.如果改成the factory答案又是其他的什么?Is this factory ( ) you want to visit tommorrow
Is this factory you want to visit tommorrow.填什么?
which that where the one.
如果改成the factory答案又是其他的什么?
Is this factory ( ) you want to visit tommorrow

Is this factory you want to visit tommorrow.填什么?which that where the one.如果改成the factory答案又是其他的什么?Is this factory ( ) you want to visit tommorrow
Is this factory___ you want to visit tommorrow.还原成陈述句后为:this factory is___ you want to visit tommorrow.可以看出主句缺少先行词,所以用the one代指先行词,其后省略了that或which.
如果改成the factory.原句还原后.
this is the factory ___ you want to visit tommorrow.先行词为the factory,在从句中做宾语,引导词that或which或省略不用.

the one 正确。
如果是这样问的： Is this the factory ___ you want to visit tommorrow? 那么答案是which ,that 都可以。原题的问法，其实是让你填一个相当于宾语的东西，所以只能填the one.

你想问什么啊!我看不懂!请想好问题!

Where do you want to visit tomorrow?