I ________ out when the telephone rangA happen B happened C happe_英语解答

I ________ out when the telephone rang
A happen B happened C happen to D happened to be
请说明为什么?

人气：323 ℃　时间：2019-10-08 15:26:04

解答

D
happen to do sth 恰好要做某事,正好/刚好要做某事
电话响的时候,我刚来出去.
因为rang 用的过去时,所以用happened