Question

Is this factory ____you visited the other day? A. that B. where C. which D. the one

Is this factory____you visited the other day?
A. that B. whereC. which D. the one
答案是D为什么不是D呢 高人解释下

Answer 1

Is this factory____you visited the other day?
A. that B. whereC. which D. the one
还原成为陈述句你就明白了：
This factory is the one(factory) (which/that/不填） I visited the other day.
这个工厂就是我几天前去的工厂。
不能填where是因为visit少了个宾语。
类似：
Is this the factory _____ you visited the other day?
这里就填：that或which。
还原成为陈述句：
This is the factory (that/which/不填）I visited the other day.

Answer 2

这句话应该选D，因为把这句话变成陈述句时；This factory is____you visited the other day.缺少表语，这4个选项中只有the one 可以，把that做代词放在这里语义不通。
如果是This is the factory ____you visited the other day。就要用B，where引导从句做地点状语。

Answer 3

这道题中，定语从句缺少先行词，所以选D。
如果factory前面有个定冠词the,那先行词就是the factory

Answer 4

D. the one
the one在句中做表语, 又作定语从句的先行词.
不能选AC, 如果这样的话,就只是定从,没有先行词.