a number of sheep ____ very happy.is 还是 area number of 后应加are 但sheep是不可数名词,怎么加?

分类: 作业答案 • 2022-07-13 12:02:06

问题描述：

a number of sheep ____ very happy.is 还是 are
a number of 后应加are 但sheep是不可数名词,怎么加?

答