向高人请教几道英文选择题，解释，谢谢！~

来源：百度知道 编辑：UC知道 时间：2024/09/18 03:47:10
They( )for shanghai on Friday。shall we go to see them off at the train station
A left B were leaving
C have left D are leaving

答案d，c为什么不可以

Old people must ( )
A be spoken to politely B speak to polite C be spoken politely D speak polite
答案a，那个to为什么要有啊？c为什么不可以

It was （ ）weather that they decide to go out for a picnic。
A such fine B such a fine
答案A，为什么没有a

-I don not have a parner to play table tennis with.
-why ( )a sport club to practise a lot?
A don't join B not joining C not to join D don't you join
答案d，请教why not 和why don't you 的区别

（ ）are you gong to write this story ?
-about five pages
A how often B how soon C how long D how fast
答案c，how long 表时间为什么可以说明故事的长短，可以表具体吗？

They( )for shanghai on Friday。shall we go to see them off at the train station
A left B were leaving
C have left D are leaving

答案d，c为什么不可以
D 是对的，语法知识：一般现在时表示将来计划中的事情
而C是 一般完成时,和提议不符,从题意看应该是将要在周五离开.
Old people must ( )
A be spoken to politely B speak to polite C be spoken politely D speak polite

答案a，那个to为什么要有啊？c为什么不可以

改为主动语态你就明白了
you must speak to old people politely
你对老人讲话要礼貌
其被动语态就为
old people must be spoken to politely.
和老人讲话要礼貌（中文还是采用了主动语态的翻译，否则就不伦不类了，老人必须被礼貌地讲话）
所以选 a （如果C改为speak politely 也可以，但是意思比较勉强 老人必须说话礼貌）

It was （ ）weather that they decide to go out for a picnic。
A such fine B such a fine
答案A，为什么没有a
很明显天气是不可数的，因此不能用 a 来修饰

-I don not have a parner to play table tennis with.
-why ( )a sport club to practise a lot?
A don't join B not joining C not to join D don't you join
答案d，请教why not 和why don't yo