选A,不定式用了完成时表明动作先发于are的时间；
B.中to arrive指将来的时间
C.have supposed to arrive 是主动语态,错误
D.supposed to arrive 是主动语态,错误还是有点搞不清A和B 的区别，能详细讲一下吗？谢谢例如：I have a lot of work to do.这句话中的to do就表示将来要发生的动作，暗含了将来时间的意思。而to have done则表示动作已经完成了。
-----You _____ here in time.----Sorry,I was held up by the accident.Aare supposed to have arrived
-----You _____ here in time.----Sorry,I was held up by the accident.Aare supposed to have arrived
B.are supposed to arrive C.have supposed to arrive D.supposed to arrive
B.are supposed to arrive C.have supposed to arrive D.supposed to arrive
英语人气：660 ℃时间：2019-12-07 02:16:10
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