Question

这是他去年工作的那家工厂吗?

误：Is this factory that/which he worked in last year?

正：

Answer 1

答案：Is this factory the one he worked in last year?
解析：

这句话是含有he worked in last year的定语从句．由于从句中有介词in，很多学生会填which或that，把this factory作为先行词，that或which作介词的宾语．但这个句子是疑问句，factory为单数名词，因此this factory为句子的主语．is为系动词，后面的定语从句没有先行词，因此用the one使句意完整．若句子为Is this the factory ________ he worked in last year？则用that或which．