语法JJ的一个疑问: each of which和each of them的谓语动词

cyorinww66

each of which后面谓语动词用复数么？只是确定each of them 后面绝对是用单数的。但each of which呢？就是这题：
GWD原题，出现在我的第六题，可见现在题目难度不断上升。
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.  选A
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.

didai1314

each是单数谓语动词

cyorinww66

LS,可是这个题的正确答案是A呀

wyw1018

GWD的答案不靠谱，正确答案为E

zxiong3

同样疑惑这道题呀。。看了jj连接里的解释就更疑惑了。。

five626

答案应该是E啊。你看外国论坛上的一个NN的解答：

this should be (e).

the other four choices all misuse "which" (or "each of which", whose modifier properties are the same as those of "which").
in (a), "each of which" doesn't refer to anything at all (it seems to refer to "reserve", but that doesn't make any sense)
in (b), "which" refers to the shark's jaws (this doesn't make sense)
in (c) and (d), "each one of which" refers to the shark's jaws (this doesn't make sense)

also:
(a) and (b) have the wrong meaning: the placement of the "when"/"whenever" clause suggests that the teeth are only there when another tooth is lost or worn down.
(c) has subject-verb disagreement ("each one of which" is singular, but "are" is plural).
(d) is a sentence fragment

cyorinww66

我感觉也是E了，现在

koko2003

应该选e吧
看这个 http://www.manhattangmat.com/forums/shark-s-tooth-t6220.html