GWD-23-13

jinqiu500

    

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.

    

 

    

1. so hard that it makes burrowing
        difficult or so soft that it could cause
2. hard enough to make burrowing difficult or soft
        enough as to cause
3. so hard as to
        make burrowing difficult or soft enough so it causes
4. 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


    

答案为A,

我认为D更为对称。

请NN指正。

谢谢。

800liang

A. so that句型在并列着且情态动词不能随意改变

you are as fat as Tom和you are so fat that ...含义是不同的

nornxiaozhu

as...as to  没有此用法

dcmczj

开始选的A，现在晕了。A前面用makes后面用could理解不了！要是虚拟语气就都是，要不用就都不用，一半用一半不用不明白！