1,如果填them,后面就成了一个句子.这样的话,两个句子在一起要有连词,也就是第二个句子要加个and.
2,除了C,基本不会出现其他三种说法.可以说so much,very much,但一般没有very so much,many so much,quite much.so very much 倒也有.too much 就很常用了,在它基础上可以说 rather too much,a bit too much,quite too much,但这些并不是所谓的词组.很多时候是习惯,不要过度钻语法.
3,不要记appear to do.如果要说语法,appear很多时候是连系动词,不是行为动词.
4,要是后面没有about...就可以用help了.
5,help yourself to ...请随意用...; help yourself for sth 没听过.
6,as far as i know不是众所周知,是据我所知.it is known to all that...; it is well/widely known that...; As is known to everone,...; As we all know,...; Everyone knows that...; 说穿了只有中文说“众所周知”,英文只说“大家都知道”