Many deer( )eating grass now

Many deer( )eating grass now those deer are eating grass. a group of deer are eating grass and leaves 对于题目我有很多疑问. 改错：1.a lot of deers are eating grass on the hill.2.many old there are many sheep eating grass.为什么加ing不是正在进行时加be的吗? 英语 There are many sheep eating grass ______ the fields and _ I saw many ____ eating grass on the hill.A horse B cow C rab I Saw many ( ) eating graSs on thehill A horSe B Cow C rabbi There,a,deer,is,grass,the,in do deer eat meat or grass? in fact,there are now so many deer that some___to places whi there is sheep eating grass over there