As she_____(walk)past the bookshop,she suddenly thought of buying_英语解答

As she_____(walk)past the bookshop,she suddenly thought of buying a TV guide
答案是was walking 可是我不懂求理解

人气：121 ℃　时间：2020-03-20 19:02:33

解答

过去进行时,表示过去某时或某段时间正在发生的动作
当她走过书店的时候,她突然想买一本电视指南.