gamt prep -39

39. Taste buds are onion-shaped structures with between 50 and 100 taste cells, each of them has fingerlike projections poking through the opening located at the top of the taste bud called the taste pore.

A. them has fingerlike projections poking through the opening located at the top of the taste bud called the taste pore

B. them that have fingerlike projections that poke through an opening located at the top of the taste bud, which they call the taste pore

C. which has fingerlike projections poking through the opening, called the taste pore, located at the top of taste bud

D. which having fingerlike projections that poke through an opening, which is called the taste pore, located at the top of the taste bud

E. which have fingerlike projections that are poking through an opening located at the top of the taste bud called the taste pore

  请教，独立主格结构 s v o , each +doing/done/adj/prep/n

  c用each of which，为什么which后面能用has不用having呢？A就可以改为each of them having

这里首先应该排除的选项是A and B， 因为them这个代词指代不明，前半句有好几个复数名词，有歧义，而且两个独立的句子中间没有连词，是run on sentence.

如果用了which，那么后半句就应该组成定语从句，我不记得独立主格结构中可以用关系代词which的，另外好像gmat不考独立主格。C是唯一没有歧义的。其余选项后半段的过去分词短语的位置也造成了歧义。

each of which不是独立主格结构，而是非限定性定语从句，后面只能跟一个句子，因此这里C each of which必须用has而不是having.

each of them才是独立主格结构，后面可以加分词，形容词短语，介词短语等