I ___ out when the phone ranghappenhappenedhappened tohappened to_英语解答

I ___ out when the phone rang
happen
happened
happened to
happened to he

人气：100 ℃　时间：2019-10-08 02:34:15

解答

happened to he
这里的be 和后面out 构成“在外面”的意思
happen to do 是“恰好在做某事”的意思