一个语法问题和一道GWD争议题

语法问题

BE在并列结果中是需要省略的,但为什么在be likely to and be unable to do中却不能省略,是否是因为是系表结构,此外还有什么情况下be不能省略呢?

GWD题

GWD题

GWD题

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

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

我看见gwd的答案是A,但一个大牛说实际应该是D.因为it 在句子中指代的是granitic soil,而不是soilmakes difficult而是hard makes difficult.

各位有什么看法

牛牛们啊~~~哞~~你们系边斗啊

我觉得这里的it是形式主语代替 it is not as hard as to make burrowing difficult or as soft as （it is ）to cause

看的清楚一点就是To make burrowing difficult  is not as hard as or as soft as to casue tunnels to collapse

楼上的,你是不是也觉得A有问题呢

还是A好，not后面不能接as……as，应该用so……as

再顶一顶,希望有结果啊