问题描述：
百思不得其解一道GMAT GWD SC题...
整个句子都划线了.
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.
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.
each of which明显要用单数啊,怎么会选a,而且句子意思when tooth is lost,many spare teeth lie in...感觉好像是牙齿掉了,其它的牙齿才lie in一样.
整个句子都划线了.
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.
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.
each of which明显要用单数啊,怎么会选a,而且句子意思when tooth is lost,many spare teeth lie in...感觉好像是牙齿掉了,其它的牙齿才lie in一样.
问题解答：
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