Question

1.Is this the factory you visited the last day?

Answer 1

1.C

选that因为factory做后面you visited的宾语,不能用关系副词where,in which.

2.D

the one 是这句中定语从句的先行词,后面省略了一个that或which.

3.B

where是关系副词,代表先行词factory 在后面的从句中he worked in that factory.所以这题也可填in which.in which = where 在这句中.