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急!2道英语选择题~谢谢!

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急!2道英语选择题~谢谢!
1.There is some question__such a person lived at all.
A,concerning whether B, as to whether
答案选择的是B.能不能选择A?concerning的用法是什么?可以接从句吗?如果是about whether 是不是也可以?
2.when he returned home, he found everything in his room was___it had been the day he left 10 years ago.
A,as B, what C, like
选择哪个 为什么?
3.It turned out what her father left her was the plain ring. she ___happier if it had been diamonds.
A, shouldn't have been B, couldn't have been
答案选择B, 为什么不能选A.
盼复!谢谢!
急!2道英语选择题~谢谢!
我给你解释第二题和第三题吧
2.B.因为空格前面是一个动词was,空格后面是一个句子it had been .(有主语有谓语即为句子)需要填一个关系连词.(把后面的动词放到从句里.因为一句话不能有两个动词)引导表语从句.表语从句属于名词性从句.而且从句里缺表语.名词性从句,从句里缺表语选连接代词what.as作为连词的时候可以引导定语从句和状语从句,不能引导名词性从句.like是动词或介词不能做连词.
3.第三句前半句是真实的对过去事情的叙述.她爸爸留给她的原来是一个普通的戒指.后半句是与过去相反的虚拟语气.如果那个戒指是钻石的话,她就会非常高兴了.虚拟语气与过去相反,从句用had done,主句用would/should/might/could have done.A的意思是本不应该做某事却做了.不能与形容词的比较级一起用.只有can和could的否定常与形容词比较级一起用,表达最高级的意思.I can't agree with you more.翻译成“我完全同意你的看法”