4 ---- I have bought an English -Chinese dictionary.

问题描述:

4 ---- I have bought an English -Chinese dictionary.
---- When and where ___you__ _it?
A do buy B did buy C have bought D had bought

选B
When and where __did_you__buy _it?
上文:我买了一本英汉字典
答:你什么时间在哪买的?对过去的事情进行提问 ,用过去