-----You _____ here in time.----Sorry,I was held up by the a

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-----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

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
再问：还是有点搞不清A和B 的区别，能详细讲一下吗？谢谢
再答：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 a you ___part in the party in time.sorry,i was delayed by the i was held up by the traffic jam. 1.I was "held up" in traffic. Sorry,I need some time to wake up.Can you try again in a few 一道英语选择题I was held up by the traffic jam,otherwise I___here 3 i got held up in the traffic on my way here 英语翻译I’m sorry I’m late.I got held up in the traffic on my wa I’m sorry I’m late.I got held up in the traffic on my way he I was just _____ for the last bus.A.in time B.on time I hear this is the first time you _____ here. I was held up in traffic 的意思