collecting"exotic"plants,_____,dates back to the earliest times.A which they are called B as they are called请翻译一下,再说一下为什么选.

问题描述:

collecting"exotic"plants,_____,dates back to the earliest times.
A which they are called B as they are called
请翻译一下,再说一下为什么选.

选B,
A引导的是从句,B是插入语

选B
which引导从句,B是插入语意思是据说