I saw many eating grass on the hill. A. horseB. cowC. rabbitD. sheep

问题补充：

I saw many eating grass on the hill.

A. horse

B. cow

C. rabbit

D. sheep

答案：

A. horse

B. cow

C. rabbit

(答案→)D. sheep

解析：句意：我看到很多绵羊在山上吃草。Horse马；cow奶牛；rabbit兔子；sheep绵羊，其单复数形式相同。Many许多，修饰复数名词，所以选D。