求助：GWD26-Q5 牛人们赐教

800120summer

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

答案是D，我觉得E表达更加简洁正确，请大家帮忙解释一下吧

AlienX

P1#131
GWD答案有很多錯, 以OG/Prep的官方答案為準 ;-)