which引导限制性定语从句的例子

Kilroy

In 1982 the median income for married-couple families with a wage-earning wife was $9,000 more than (that for families in which only the husband) was employed.
——OG 137

princess

which引导限定性定语从句的例子是有的，在lzm那本书里有提到
不过那个题五个选项都是用which引导的

tongxun

这个是用的in which 。一般which引导这种定语从句，其前面都有介词。
in which =that