Question

高中英语定语从句

这道题：On the border between England and Wales,there is a town which was once only a market,but___has now become a huge bookstore as well
A.where B.which C.what D.that.
答案选B，我选的是D。老师说but后面的都是从属于which这个定语从句的。为什么

Answer 1

but前面有逗号，所以是非限制性定语从句，非限制性定语从句中先行词指物只能用which

Answer 2

前后要一致啊，前面town的连接词就是which，but只作为一个关联词，后面的连接词要与前面的一致。