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
A: each of them 独立主格不应该是完整句子，应该改成分词having; called 修饰的对象不对
B: they无指代对象；which 指代错误
C: correct
D: which having 错;
E: each of which have 应该改成has; called 修饰的对象不对
注意：
1、B, called A, 常见错误替换为B, which they call A，想用they指代大众，错！
2、each of them独立主格方式和each of which/whom 都是很好的表达，具体看其他错误
3、过去分词的后置修饰必须紧挨修饰语，插入语成分可以不算
其他部分都没有问题，答案我也通过别的途径选出来了可是看到注意点的第三点我就急了！我记得插入语可以用在理解句意上省略可是在修饰的过程中是会产生一定影响的。再看看C选项的located，我的理解是修饰taste pore，可是prep的解释里面的意思是修饰opening 吗？（虽然结果是一样的因为opening called taste pore，可是对于这个点我有点困惑，可以跳过修饰语，过去分词不是紧邻修饰的吗？）