Although senior citizens can contribute to society, I would argue that this demographic change can bring some problems.
这个句子中的although 是否可以替换成while？同样是引导让步状语从句，while 和although 有什么区别么？
谢谢老师的回答
For example, in English you say strong wind but heavy rain. It would not be normal to say heavy wind or strong rain.本句中but应该是连词，但是结合语义没有转折的意思，反倒应该像是and的意思；请教关于这种but的意思以及类似表达。
I would like to make an appointment for Friday for medical check-up.这里为什么用for Friday？为什么不把for Friday移到后面跟着on Friday呢？又或者说把on或for都不要了，直接把Friday放到后面当作时间副词使用.
...s athletic’][5] I can no more apologize than I could kneel to them.[6] I would no more think of hitting a student than I would a policeman.No more ... than has the same meaning when more modifies a tradable noun:[7] She is no more a fool than you (are). [‘She is not a fool, any more than you are...
He would resurrect his old eager ambitions and pursue them without faltering. Those solemn but sweet organ notes had set up a revolution in him. 请问老师句中的but如何理解？什么词性，用法，和含义？
Those with
degrees from elite universities catch up fairly quickly to where they otherwise
would have been if they had graduated in better times.为什么先行词用where呢？而且where引导的句子也没看懂？那个otherwise又是什么意思呢？充当什么成分呢？
有这样一道改错题（位于动词accompany 词条后面）：
1. Once he made bold to ask her to accompany him to go to a party.
2. I have two tickets for the theatre on Saturday evening—would you care to accompany with me?
It would pay you to ask if there are any jobs going at the London
office. 问一下伦敦分公司是否有职位空缺对你有好处。请问这里的going是与修饰any jobs还是与going at是一个整体？做的是什么成分，起什么作用，译为什么？
...a ___41___ just a few weeks
ago. And it came to me then how much easier it would be if we had a range of
words that express different ___42___ of gratitude (感谢).
My thoughts were soon ___43___. We had a woman patient who
was ___44___ from a knee replacement operation. One afternoon, while ___45...
John was given the same suitcase his father and grandfather ____ (take) with them to school.这里是不是可以填 took / had taken / would take三种？如果用 had taken 的话，会不会被理解为“已经被带去学校，而没带回来”，类似于had gone to 用法？谢谢
Once Mattew grew comfortable speaking a word, he would stop using the sign that stood for it.请问上面例句中comfortable后面是否省略了一个介词（比如with 或者 in）？如果是的话，请问什么时候省略？什么时候不省略？还是随意？如果不是，请问此处...
“Britain is only granting ONE visa for every TEN refugees” shouted the newspaper recently; it would normally only complain if the ratios were reversed.谢谢各位老师！
句子里的an illusion是什么成分？
There are several reasons why Kissinger no longer appears to be the magician the world press had made him out to be ,an illusion which he failed to discourage because,as he would admit himself ,he has a tendency toward megalomania.