1. can be used to say “it depends” as shown in 看你去哪一种地方买东西 and 你要看是什么样的东西.

2. You can use 哪里 to ask for more information about a matter being discussed, as in 哪里比较好

3. A new word was used in the line 很多电子商品都有一段时间的保证.