TTGWD2－33，没搜到

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.

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.这题答案给A，为什么？each of which
   难道不用单数吗？还有其他选项的which是否有歧义？（jaws,teeth）我选了E，觉得each one ready是个同位语，对么？

我也选了E,

难道A选项里WHICH 后面的从句修饰的是TEETH？ 不知道应该怎么理解。。

高人指点啊！！～～

但是A 项中的EACH 后面为什么加ARE呢？ 也不对啊？

弱弱地说：

我觉得E有一个比较明显的错误就是 each one ready to slide into the appropriate position whenever an active tooth is lost or worn down.whenever从句前面的句子缺少动词谓语 这点跟OG上的一道题目的错误比较类似

有人对C感兴趣么 我比较喜欢C的 弱弱地说