xiexieThough his faher for many years……A has retired B has been retired 为啥要be 而不选A?--Yeterday was Saturday ,you to work.--I thought it was FridayA didn‘t have to go B needn’d have goneIn order to host the World‘s Fai

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xiexieThoughhisfaher______formanyyears……AhasretiredBhasbeenretired为啥要be而不选A?--YeterdaywasSaturday,yo

xiexieThough his faher ______for many years……A has retired B has been retired 为啥要be 而不选A?--Yeterday was Saturday ,you ______to work.--I thought it was FridayA didn‘t have to go B needn’d have goneIn order to host the World‘s Fai
xiexie
Though his faher ______for many years……
A has retired B has been retired 为啥要be 而不选A?
--Yeterday was Saturday ,you ______to work.
--I thought it was Friday
A didn‘t have to go B needn’d have gone
In order to host the World‘s Fair ,the city___bulid a huge exhibition centre
A must B should C need BC错哪了?

被动的。

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1. retire 可及物，也可不及物。
选A的话，意思是：尽管他父亲退休多年，。。
选B的话，意思是：尽管他父亲被打发退休/被辞退多年，。。。
看上下文。如果只有这一部分的话，我觉得都可以。
2 选A
.need 一般很少用在否定中，更何况还是过去完成的否定。
从来没有看到过needn't have gone这种说法。
3. 为了。。。，这个城市“必须”建一座大型展览中心。
看意思是强调“必须”。
（弱弱地说，我感觉用shoud，也没啥问题。语法肯定不错，就看出题老师怎么想了）
希望对你有帮助~

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第一题我觉得答案也是A吧，最好把题目打完。
第二题选A吧，原因1是时态didn't与yesterday呼应，原因2是have gone to是指去了没回来吧，和现在的对话有矛盾
第三题考察情态动词，为了主办世界大会，城里必须要建一座巨型展馆。采用排除法，should的主语一般是人，以第一人称居多，强调主观决定，need做情态动词常用于否定句和疑问句中，如果做实义动词在这里应该是第三...

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xiexieThough his faher ______for many years……A has retired B has been retired 为啥要be 而不选A?--Yeterday was Saturday ,you ______to work.--I thought it was FridayA didn‘t have to go B needn’d have goneIn order to host the World‘s Fai main() { double fah,cel; printf(put a number ); scanf(%f,&fah); printf(%f,fah); na cuo le ASCII编码中的值FaH是什么符号? 皇太后花园 MAE FAH LUANG BOTANICAL GARDEN怎么样 Mae Fah Luang University,Chiang Rai,Mahasarakham University的中文叫什么啊?这是两所泰国大学的名字 his His 边为一的正方形ABCD被两条与边平行的线段EF,GH分四小矩形,角FAH=45度,求AG+AE=FH 如图所示.GH、EF分别为正方形ABCD边上的平行线,相交与点P.且矩形AGPE为PFCH的一半.求∠FAH的度数晶振频率6MHZ,计算延时时间?DELAY:MOV R7,#0F6H LP:MOV R6,#0FAH DJNZ R6,$ DJNZ R7,LP RET 正方形ABCD被两条与边平行的线段EF、GH分割为四个小矩形,EF与GH交于点P,若∠FAH=45° 证明：AG+AE=FH 如图所示.GH、EF分别为正方形ABCD边上的平行线,相交与点P.且矩形AGPE为PFCH的一半.求∠FAH的度数用勾股定理、全等,不要用相似. (1) AND AL,0FAH XOR AL,0FFH (2) XOR AL,0AFH OR AL,50H 阅读上述指令,分别回答各指令序列完成什么功能? his mind ()his work his所有格 His mistakes his right his sister