A group of ________ are eating ________ and ________ at the foot of the hill．
A.sheeps, grasses, leavesB.sheep, grass, leafC.sheeps, grass, leafsD.sheep, grass, leaves在线课程D
解析：
解题思路：普通名词分为可数名词和不可数名词，grass是不可数名词，而leave是可数名词，sheep是单复数同形的词，类似的词还有：means(方式)，works(工厂)，deer(鹿)，Japanese，Chinese等．注意根据语境正确区分它们的单复数：every means(单数)，all means(复数)．