问一道GWD的题

小意达de花儿

GWD-23-Q13

Researchers hypothesize that granitic soil is the ideal construction material for the desert tortoise because it is not so hard that it makes burrowing difficult or so soft that it could cause tunnels to collapse.

A.so hard that it makes burrowing difficult or so soft that it could cause

B.hard enough to make burrowing difficult or soft enough as to cause

C.so hard as to make burrowing difficult or soft enough so it causes

D.as hard as to make burrowing difficult or as soft as to cause

E.too hard, making burrowing difficult, nor too soft, so as to cause

为什么D不对呢，我语法最弱了，跪求解释

kikisunflower

as...as...不是这样用的

as adj. as none.

as adj. as +clause

小意达de花儿

as...as...不是这样用的

as adj. as none.

as adj. as +clause

-- by 会员 kikisunflower (2011/5/9 16:25:59)

明白了，谢谢，看来还要背背曼哈顿和语法笔记啊
多谢了