Many sheep eating grass by the river.A. isB. areC. is beingD. have

问题补充：

Many sheep eating grass by the river.

A. is

B. are

C. is being

D. have

答案：

A. is

B. are

C. is being

D. have

解析：sheep 单复数同形，而主语Many sheep表明是复数意义，故选B。