英语代词语法问题* is the one of many evils which tends/tend to perpetuate itself / themselves.请问,是选tends/itself还是选tend/themselves.为什么?

问题描述:

英语代词语法问题
* is the one of many evils which tends/tend to perpetuate itself / themselves.
请问,是选tends/itself还是选tend/themselves.为什么?

肯定是tend,修饰的中心词是evils,复数的

tends/itself.
这里面which所指代的*,而*只是many evils中的一个.所以应该用“三单”形式,而后面的也应用单数.