China has hundreds of islands,_____we all knowA.in which B at which C.of which D.which

问题描述:

China has hundreds of islands,_____we all know
A.in which B at which C.of which D.which

D,这是一个非限制性定语从句,which修饰islands,为什么不用介词of?是因为know本身就是个实意动词,可以直接接宾语,而know of表示是理解,了解到的意思,显然和原句意思不相符合