we must do what we could___(save) the person who is in need

we must do what we could___(save) the person who is in need what we need is the 连词成句,who in need should we the person help we must save the ___________animals in the world（danger） what do we need? What we need to do is 后跟 The animals are in d_ .We must save them. We must find a person ___ (do) the work. What we need to do is _____(protect)the animals.We should't What should we do to save the earth?是什么时态 what can we do to save the animals? what can we do to help save the world?作文