he was about to tell me the secret_____someone patted him on shoulder A,as B,until C,while D,when

题目

he was about to tell me the secret_____someone patted him on shoulder A,as B,until C,while D,when
as与when不一样吗?
答案貌似是D{貌似}

答案

答案是D 该题 有3个知识点 1）when是“等立连词”=and then; and at that time 意为“就在那时；突然”when前面通常还要用逗号2）be about to do sth.正要做某事 （不能接表示将来的时间状语）3）pat sb.on the+身体...