Where did the stream ( )? a.flow b.flowed c.flew d.fly 选哪个,为什么

问题描述:

Where did the stream ( )? a.flow b.flowed c.flew d.fly 选哪个,为什么

A did 用原型 意思是:小溪流向哪里?d选项意思不对 b c时态不对