【题目】Is this the factory _______ you visited the other day?
A. in which B. which
C. where D. the one
在线课程【答案】B
【解析】考查定语从句的用法。这是你几天前参观过的工厂吗？这类题可以先把它转换成陈述句在做：this is the factory __you visited the other day .则可知 "__you visited the other day " 是定语从句修饰factory 的，先行词是factory，可以用关系代词that,which或不填，结合句意，故选A。