费解的英语题!
问题描述：
费解的英语题!
Insects'ability to breed rapidly enables them to develop large populitions,____are pests.
填of whom two-thirds 还是two-thirds of whom
难题一定追加分!
那为什么of whom two-thirds 不对呢?!
到底是哪个?说明下原因吧,谢谢了!
答
two-thirds of whom