Question

You don't need __cats because they are lazy

Answer 1

答案B

need to do表示句子主语需要去做某事

need doing表示主语需要被做=need to be done

如：This room needs cleaning to be cleaned.这个房间需要打扫了（房间被打扫）.

I need to go there.我需要去那里一趟（我去）