the animals in cages _______ be happy.

the animals in cages [ ] be happy The animals is in cages can't be happy.They should be f_____ The animals in cages can not be ( ) A angry B happy C feiend the animals in cages cat't ___ happy Tigers are ____ animals.They should be in the cages. animals kept in cages are not really happy为什么没有be 不是被动语态吗 为什 The zoo kept some animals in the cages so that they would no Thet keep the animals in tiny cages.（改为被动语态） Animals that are kept in the tiny cages can hardly move,__ _ The animals are kept in tiny cages and can hardly move at al The animals are tired.But now they have to s____ in cages or Today zoos keep animals in different kinds of cages ,the （）a