Help me English questions.When they walked-----the bookshop,they _英语解答

Help me English questions.
When they walked-----the bookshop,they went in and bought a magazine.
a.past b pass c passed d to past
要理由

人气：150 ℃　时间：2020-05-08 16:23:10

解答

past 为介词,经过、路过的意思,
pass是动词,不能这样与walk 同时使用.
walk past 在这里为走过