将燃着的小木条神人正放在桌上的装满氧气的集气瓶中，观察到小木条燃烧的更旺，说明氧气具有的性质是：

（1）____．

（2） ____

    Hello! I'm Ben. This is my new living room. It's quite big. There is a chair and two big sofas. There are some flowers beside the sofa. Between the sofas, there is a lovely cat. There aren't any pictures but a clock o n the wall. There is a computer on the desk next to the sofa. There is a TV set on the TV stand(电视柜) under the window. I often watch TV in my living room. What a nice living room.

① ____  ②____  ③____ ④ ____  ⑤ ____

用修改符号修改病句。

①我虽然为你的处境，但是为你的心态难过。

②我读到您写给小学生的信从报上。

③你在来信中并没有完全全面地介绍自己。

—Is there      uniform on the sofa?    —No, there is       on the desk.