The elephant is _____ useful animal to human beings.A.a B.an

The elephant is _____ useful animal to human beings.A.a B.an ------ elephant is ----- useful animal to human beings.填神马? ___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D. _____ is the biggest animal on land.A.lion B.an elephant C.a ( )elephant is ( )useful animal to p an useful animal?还是a useful animal? 改错：A fox is an useful animal. an eiephant is-useful animal的横线应填什么?A.a B.an C.the D./ 1.The dog is a useful animal. An elephant is _____ than a horse. A horse is a useful animal和The horse is a useful animal Since human beings depend to a great