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：本题考查名词复数。根据many许多可知名词用复数形式，sheep的复数形式还是它的原型，选D。