when he ( )the door ,he found his keys wewhen he ( )the door ,he _英语解答

when he ( )the door ,he found his keys we
when he ( )the door ,he found his keys were nowhere.
A.would open B.opened C.had opened D.was to open
答案是选D,但是A也表示过去完成时,为什么不选A?

人气：281 ℃　时间：2019-10-27 08:41:55

解答

选D 正要./刚准备.
这是一个很好的英语句型.