a number of sheep ____ very happy.is 还是 are
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
are
sheep 单复数同形
类似还有：fish deer那要是像water information 之类的不可数名词用什么a number of 后跟可数名词，还是复数如果真是不可数名词主语的话，那就用is