5 The particular design of muscles and bones in the neck and limbs of the turtle allow

that it can draw in its exposed parts such that an attacker can find nothing

but hard shell to bite.

A.     allow that it can draw in its exposed parts such that

B.     allow it to draw in its exposed parts, and so

C.     allows for it to draw in its exposed parts and that

D.     allows that it can draw in its exposed parts, and so

E.      allows it to draw in its exposed parts, so that

answer: D  我选E and so 很不标准阿 再说allow sb to do sth 很常用阿

perfer E too!

In answer D, and so is awkward!

If you have seen all the discussions before, you should find out that most of the people chose E.

However, in my humble opinion,neither D or E is perfect.
 

D's mistake is "allows that," which means an action that doesn't match the idea of this context.

E's problem is "so that," which doesn't carry the original logical meaning of the context. It gives people the wrong idea that the turtle's design permits the attackers not to find its head. Further more, there shouldn't be a coma in front of "so that."

A better choice should be like the following:

The particular design of muscles and bones in the neck and limbs of the turtle
allows it to draw in its exposed parts, and so attacker can find nothing

E中省略了情态动词can，不知道是不是这个原因

allow that是感觉怪怪的，但是能查到有这样的说法