It is a__difficult question,so it is___impossible for me to answer it Atoo,quite Bso,fairlyC rather,quite Dvery,rather为什么选C,这些词有什么区别?

impossible是不可分级的形容词 只能用quite修饰
按语气强弱来分 very>rather/pretty>quite>fairly
quite和rather都可以修饰形容词 但是rather后面可以接比较级 或者是 too+形容词 quite就不可以
quite有时也与比较级连用,但通常只限于quite better (身体好)这一表达中
只有quite可以修饰不可分级的形容词 如right, wrong, ready, full, empty, perfect, impossible, alone, unique等 但是这时候quite的意思是【完全】
另外这几个词在和【冠词＋形容词＋名词】连用时 放置的位置不同 如 a very good idea=quite a good idea=rather a good idea

quite impossible 比较难
rather修饰difficult
而前面有一个a所以才不可以用too除非你直接说It is too difficult

这道题的意思是这是一个很难的问题,所以对我来说回答它是相当不可能的
1 这几个程度副词的程度比较从弱到强是 fairly very quite rather
This film is fairly good.这部电影还可以看看.
Your composition is quite good.你的作文还不错.
His homework is rather good.他的作业相当不错.
2 fairly只用于修饰褒义的形容词和副词,如可以说She is fairly clever,不可说She is fairly She is fairly foolish.rather主要用于贬义,如rather poor/bad/stupid/ugly,但它也可以用在某些褒义的形容词和副词前,具有比fairly更强烈的褒义,相当于very,如rather good/well/pretty /clever.另外,若在没有褒贬意义的词前用fairly,表示说话人赞同；若用rather,则表示不赞同.试比较：
This soup is fairly hot.这汤蛮热的.
This soup is rather hot.这汤太烫了.
She is fairly tall for her age.就她的年龄来说,她长得算是高了.
She is rather tall for her age.就她的年龄来说,她长得过于高了.
3．rather可与too及比较级连用,而fairly和quite则不可.如：
My mother is rather better today.我母亲今天病好多了.
This book is rather too difficult for the juniors and rather too easy for the seniors.
ifficult for the juniors and rather too easy for the seniors.
这本书对低年级学生说来未免太难,对高年级学生说来又嫌太容易.
4．quite和rather还可和动词连用,fairly则不可和动词连用.如：
This does not quite satisfy me.这没有完全使我满意.
I don't quite follow you.我不大懂你的话.
They rather expected to win the match.他们颇想赢得这场比赛.
I rather like her.I rather like her.我相当喜欢她.
5.quite和rather都可修饰名词,但须放在不定冠词前.如：
That was quite an accident.That was quite an accident.那是一次不太寻常的事故.
It”s rather a pity.s rather a pity.这真是相当遗憾.
当名词前有形容时,quite和rather可放在不定冠词后,也可放在不定冠词前.如：
They had a quite good time.也可说quite a good time.
It is a rather cold day.也可说rather a cold day.
这个题中 too修饰形容词,题中修饰名词不能选.fairly程度较浅而且修饰褒义词居多,题中程度深而且偏贬义词不能选.impossible是极限形容词,即没有比较级和*,通常情况下只有quite 可以,一般不用rather.所以第二个空quite最合适.

too so 前不能加冠词。A B排除。quite 和impossible 这个形容词连用表示完全没可能，绝对没可能。而rather 没这个极端的意思。所以选C