this kind of books ______ out in this bookstore.

问题描述:

this kind of books ______ out in this bookstore.
A. is sold B. are sold this kind of 做主语,动词用单数,这里应该选择哪个?如何解释?

this kind of books ______ out in this bookstore.A.is sold 回答的是这类书,作为一个整体,当然用单数.书店里这类书已卖完(或售完)