11.Don't you know he is an old friend of

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11.Don't you know he is an old friend of
　　A）my brother B）my brothers C）my brother's D）my brother's friend
选什么?为什么?

选择C.这里考察的是名词的所有格形式,比如,这是我的书本,This is my book=This book is mine.也就是说mine是表示什么东西是我的,是一种所有格形式,那么这里相当于he is my brother‘s old friend=he is an old friend of my brother’s,道理和上面举的例子是一样的.
再问：你太列害了！想再请教一个选A 14. , I should ask them some questions. 　　A）Should they come to us B）If they come to us 　　C）Were they come to us D）Had they come to us
再答： should放在句首表示的是一种虚拟语气，这里的意思你可以理解成，假如（表示一种虚拟0他们来我这里，我就会问他们几个问题。明白吗？
再问：是的！
再答： should放在句首是一种虚拟语气，这里的意思你可以理解成，假如（表示一种虚拟0他们来我这里，我就会问他们几个问题。明白吗？例如这个句子 Should you have any question,you could contact me 相当于 If you have any question,you could contact me.
再问：那选B哪？翻译成如果他们来这。。。B错在哪了呢？会不会是时态有问题？还是什么别的
再答：如果选B 的话，后面的I should ask them some questions.中加上should就不太恰当了，最好是改成I will ask them some questions，这样就可以喝If相对应了，明白吗？其实英语是个语言，没有绝对的对与错，只有哪个更加恰当，这个句子中用will比用should更加恰当，所以如果选择B 的话就要改成will。那么这里就应该选择A，是一种虚拟语气，I后面用shoul其实就是一种提示啊。明白了吗？ ps：请问一下哈，可以选择我的回答为满意回答吗？十分感谢啊。有什么问题我再帮你解答。

11.Don't you know he is an old friend of sorry ,i don't know he is a friend of ______ He is an old friend of my father.哪里有错? Why did you speak to Peter that way?Don't you know he is an you even don\'t know what is friend是什么意思 An old friend of [ ] is an engineer. I don't like Mr.Green,because he is an old man 这里的an old peter is an old man.1 he and some of his old friend were tal How old is he? I don't know （变为同义句）I don't know ____ ____ Aren't you John's friend?______.I don't know him.I am new he I don't know how old he is.(改为同义句） I have__ __how old he is. 11. She is such an irritating woman, I don’t know how you ca