根据句意及首字母（汉语）提示，补全单词。

1. We should use these bottles for r__    __.

2. All these houses were b___    _ with some used things.

3. P____   the door first when you come into my office.  Don't push it.

4. Our teaching building has a special r__    __.  It looks very, beautiful.

5. My brother has a____    （模型）of Shen Zhou V space ship.