Question

【题目】He worked in a car factory for four years, ______ he founded his own company in his hometown.

A. after which B. after when

C. after that D. after it

Answer 1

【答案】A

【解析】试题分析：这是一个非限制性定语从句，在从句中由于介词after提前了，根据句意，可知要用关系代词which，故选A。