When I saw ( ) book that I bought it at once.A、such goodB、 so goodC、so good aD、 such goo

When I saw ( ) book that I bought it at once.A、such goodB、 so goodC、so good aD、 such goo

选 C
When I saw (so good a) book that I bought it at once
当我看到（如此好的一本）书，我立刻买了.
辨析such…that…和so…that…
such…that…与so…that…都可以用来引导结果状语从句，意为“如此……以致……”。
（1）such是形容词，它所修饰的名词可以是可数名词，也可以是不可数名词；名词前面可以带形容词，也可以不带。如果其后是单数可数名词，前面需加不定冠词a或an。因此，such…that…的句型结构可分为以下三种：
①such+a（n）（+adj.）+单数可数名词+that从句。如：
She is such a good teacher that all of us love and respect her.她是一位很好的老师，我们都敬爱她。
Table tennis is such an interesting game that people all over the world play it.乒乓球是一项很有趣的运动，以致全世界的人都参加这项运动。
②such（+adj.）+复数可数名词+that从句。如：
They are such interesting books that I want to read them once more.这些书非常有趣，我想再读一遍。
③such（adj.）+不可数名词+that从句。如：
It was such bad weather that I had to stay at home.天气太坏，以致我不得不呆在家里。
（2）so是副词，与形容词或副词连用，其结构是：so+adj.（adv.）+that从句。如：
He ran so fast that I couldn’t catch up with him.他跑得那么快，我赶不上他。
I am so sleepy that I can hardly keep my eyes open.我太瞌睡了，眼睛几乎睁不开了。
注意：①当名词前面有many，much，few，little等表示数量多少的限定词时，应该用so，而不能用such。如：、
There were so many people in the street watching the fire that firefighters could not get close to the building.街上围观大火的人太多了，消防队员无法靠近大楼。。
②当单数名词前有形容词时，既可用so，也可用such，但不定冠词的位置却有所不同。如：
This is such an important meeting that you should attend it.（=This is so important a meeting that you should attend it.）这是一次很重要的会议，你一定要参加。

When I saw ( ) book that I bought it at once.A、such goodB、 so goodC、so good aD、 such good a这道题答案是D,因为book是名词，so只能修饰形容词，所以用Such
such good 是错误用法

D
因为book是名词，so只能修饰形容词，所以用Such
such good 是错误用法

答案是C so good a book