Please buy me a dictionary_when you go to the bookstore.

问题描述:

Please buy me a dictionary_when you go to the bookstore.
A.while B.when C.until D.because
选A为什么不对?如果没有B选项的话,

你自己不是已经有答案了吗?——B呀
你选的是对的.译为:当你去书店的时候帮我买本字典.