It's expected that the new highway____completed by next June

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It's expected that the new highway____completed by next June.
A.would be B.will have been C.has been D.had been
Be quick,or the train____by the time we get to the station.
A.leaves B.has left C.would leave D.will have left
When you get home at seven o'clock tonight,I____reading this book.
A.have finished B.finish C.will have finished D.finished
这三道题的答案都是“will have 过去分词”,是否有共同点?
为什么这样选?考点是什么?
最好每道题都分析一下,
回答最好通俗易懂,如果差不多的话,字多的给分.

这三道题考的都是将来时下的完成时态
通过翻译就可以看出来
1.希望明年六月这里的新高铁能开通分析这一道题首先有个next june 是明年6月所以可以知道得用将来时所以 A C D都排除了再看意思说话人的意思肯定是指希望明年六月高铁已经修好了所以肯定是完成时态所以选B
2.快点否则等我们到了火车站车就开了分析这一道题首先有个等我们到了火车站车就开了这说明还没有到所以也要用完成时此外我们到的时候车已经开了也是个完成时态所以只能选D
3.今天晚上7点到家时我这本书就看完了和前几道一样当你到家时说明还没到家所以要考虑将来时我已经看完了要用完成时
多听听多看看看外语电影对英语有很大帮助
希望我的答案可以帮助你

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