____,George would certainly have attended the meeting.

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____,George would certainly have attended the meeting.
A.If he didn't get a flat tire
B.Had he not had a flat tire
C.If the tire hadn't flattened
D.Had the tire not flattened.
一开始选D了,可是答案是B,请问为什么选B?怎么会有2个had..求解题思路,翻译下

这句话的意思是如果George的车胎不漏气的话,他是能够参加会议的.
前半句直译：如果他不是有一个漏了气的车胎的话（意译就是如果他的车胎不漏气的话）
这半句是虚拟语气,虚拟出如果车胎不漏气的话,事实上已经发生了.车胎漏气是过去时,对过去时虚拟要用过去完成时,前半句话的形式是If he had not had a flat tire,had a flat tire是have a flat tire,指有一个漏了气的车胎.所以会出现had,对于过去完成时的虚拟语气,可以将had提前,省略if.变成了省略句.形式就变成了Had he not had a flat tire.
再问：这道题为什么要从A,B里选而不从C,D里选？
再答：这句话的主语是he而不是汽车轮胎，而且汽车的轮胎是自己坏的而不是被别人弄坏的。C项的被动在这里是不适用的，the tire 不是主语不应该放在提前的助动词之后，所以D项也是不对的。
再问： the tire为什么不能作这道题的主语？
再答：这和后半句是有关系的，后半句的主语是George，说明前半句的主语也是George，也就是前半句的he，省略句之所以能省略，是和主语也有关系的，前后两个半句的主语要一致，如果用the tire的话，两句话的主语不一致，是不能省略的。

____,George would certainly have attended the meeting. mr smith would certainly have attended the meeting on time b ___ the meeting ,he would have attended. He must have attended the meeting yesterday,___he? James attended the meeting and ------- ____,george would have been a rich man. -How many people attended the meeting?-____ fifty people.A.a The manager could have attended the meeting himself.为啥不可以用by She was ill,She can t have attended the meeting here I'm surprised that he should have attended the meeting but h About ______students attended the meeting last week. the meeting is well attended是什么意思