看关于比较级的这道题Mary is 1.67metres tall,while Alice is 1.76 metres tall,so we can say that Mary isn't _____Alice.A.as tall as B.so tall as C.taller than,我到是知道和.不一样那个结构,可是不是not as...as 不也可以么?

看关于比较级的这道题Mary is 1.67metres tall,while Alice is 1.76 metres tall,so we can say that Mary isn't _____Alice.A.as tall as B.so tall as C.taller than,我到是知道和.不一样那个结构,可是不是not as...as 不也可以么?
看关于比较级的这道题
Mary is 1.67metres tall,while Alice is 1.76 metres tall,so we can say that Mary isn't _____Alice.
A.as tall as B.so tall as C.taller than
,我到是知道和.不一样那个结构,可是不是not as...as 不也可以么?还有选C为什么不对呢?

看关于比较级的这道题Mary is 1.67metres tall,while Alice is 1.76 metres tall,so we can say that Mary isn't _____Alice.A.as tall as B.so tall as C.taller than,我到是知道和.不一样那个结构,可是不是not as...as 不也可以么?
整句话的翻译：MARY是1.67米高,而ALICE是1.76米高,所以我们可以说MARY不如ALICE高.
而C的答案表面看似正确,但一般比较级都是用肯定词连接的.用as~~as是用在肯定句,而在否定句中是so~~as,所以选择B