TT-2-33 HELP ME OUT

Q33:

When an active tooth in the shark’s jaws is lost or worn down, many spare teeth lie in seemingly limitless reserve, each of which are ready to slide into the appropriate position.

A.    When an active tooth in the shark’s jaws is lost or worn down, many spare teeth lie in seemingly limitless reserve, each of which are ready to slide into the appropriate position.

B.     Whenever an active tooth is lost or worn down, many spare teeth lie in seemingly limitless reserve in the shark’s jaws, which are each ready to slide into the appropriate position.

C.     Many spare teeth lie in seemingly limitless reserve in the shark’s jaws, each one of which are ready to slide into the appropriate position when an active tooth is lost or worn down.

D.    The many spare teeth lying in seemingly limitless reserve in the shark’s jaws, each one of which is ready to slide into the appropriate position whenever an active tooth is lost or worn down.

E.     In the shark’s jaws, many spare teeth lie in seemingly limitless reserve, each one ready to slide into the appropriate position whenever an active tooth is lost or worn down.

   Answer: A

MY CHOICE IS E

E句,首先改变了句子中心,将地点状语提前至句首从而修饰的全句.

第二,each one ready to slide 如果做独立主格理解,应该是each直接+adj/ed的.

it seems ok "each of which are" if which refers to plural

我选的是A...结果给的正确答案是E,本人觉得each one不常用,且wordy,用each即可.

A里面的are确实也很难解释,做题的时候就觉得没有一个是对的.....