a,英語語言習(xí)慣是這樣吧,不要用中國(guó)思維去想（這樣想的人估計(jì)會(huì)選b和c）
我自己是到了一定程度時(shí)候可以靠預(yù)感選的,沒有多少材料給你對(duì)比,找了其他資料給你看看,因?yàn)槲乙郧岸际怯X得英語很麻煩,哈哈,要懂得總結(jié)哦
下面是復(fù)制別人的,希望你以后遇到類似的問題可以自己解決
帶as(so)… as的結(jié)構(gòu)
1.在表示“和…一樣…”時(shí),可用“as...as”結(jié)構(gòu)(前面的as后要用原形)：
He is as busy as before.他還是和以前一樣忙.
I’ll give you as much help as I can.我將盡量幫助你.
The airport was as crowded as ever.機(jī)場(chǎng)還是像平常那樣擁擠.
You’re as good a singer as Johny Buck.你的歌唱得像約尼∙伯克一樣好.
Modern computers can be as small as a book.現(xiàn)在的電腦可以像一本書那樣大.
2.在表示“不像…那樣…”時(shí)可用“not as(so)...as”這種結(jié)構(gòu)：
It isn’t so cold as yesterday.今天不像昨天那樣冷.
He is not so handsome as his brother.他不像他哥哥那樣英俊.
I’m not so experienced as you think.我沒有你想的那樣有經(jīng)驗(yàn).
The situation is not so bad as had been painted.形勢(shì)沒有描繪的那樣糟糕.
Jack is not as(so) old as he looks.杰克不像他看起來那樣老.
3.這種結(jié)構(gòu)中也可包含一個(gè)狀語或有almost,just,nearly,quite這類副詞形容：
The whale was twice as long as her boat.那頭鯨有她的那艘船的兩倍長(zhǎng).
Their house is about three times as big as ours.他們的房子約為我們房子三倍大.
My command of English is not half so good as yours.我的英語掌握得還不及你的一半好.
He was almost as diligent as his sister.他幾乎和她姐姐一樣勤奮.
She is nearly as tall as her mother.她幾乎和她媽媽一樣高.
4.as...as還可用在許多固定說法中：
as brave as a lion
as busy as a bee
as vain as a peacock
soft as velvet
as bright as day
as fat as a pig
as gentle as a lamb
easy as ABC
另外找了別的固定搭配 關(guān)于 so as 跟so that 的,其實(shí)很簡(jiǎn)單的
Tom is _so_ good a student _as_ is often praised by the teacher.
Jack is _so_ smart a boy _that_ he can work out difficult maths problems quickly.
so……as中as必須在從句中擔(dān)任成分（主語、賓語等）,而從句就是我們熟悉的定語從句咯.
so……that中的that 不能在從句中擔(dān)任成分,只是單純的先行詞,從句也就不算定語從句了.