Zoo are terrible places for animals to live .这句中为什么没加in

Zoo are terrible places for animals to live .这句中为什么没加in Zoos are terrible places for animals to live 中为什么没in Zoos are terrible places for animals to live 为什么后面不加in? 同义句转换：Zoo are terrible places for animals to live in. Zoos are terrible places for animals to live.一句中live后面为什么不加i Zoos are terrible places for animals to live.次句句末为什么不用in? Zoos are terrible places for animals to live in.此处to live in Zoos are terrible places for animals to live.应该live 后有in zoos are terrible places for animals to live Zoo are terrble places for animals to live in. (改为同义句) zoos are terrible places for animals to live.places 在句中作什么成分 live 的用法zoos are terrible places for animals to live与i have