nobody but Mr.Green and Bob____in the classroom yesterday.

分类: 作业答案 • 2021-12-03 10:55:24

问题描述：

nobody but Mr.Green and Bob____in the classroom yesterday.
A.is B.was C.are D.were
答案是用B``可是为什么要用B?

答

首先,后面有yesterday,表明要用过去式
前面有and,be要用就近原则,用第三人称.