let's go out for a walk同义句 _____ ____ going walk for a walk _____ _____ go out for a walk

Let's go out for a walk.= (What/How about) going for a walk?= (Why not) go out for a walk?= (Shall we) go out for a walk?= (Let us) go out for a walk.楼主不打标点符号,不好做啊.