there are 2 doors,one of which ( ) to the living room and the other to the kitchen.

问题描述:

there are 2 doors,one of which ( ) to the living room and the other to the kitchen.
A,leads B.to lead C.leading D.led
为什么用三单?

one of ,其中的一个,主语是单数,谓语动词用三单