根据句意和首字母提示完成单词 。

1. Thomas Edison was an inventor, he i            the light bulb.

2. Mr White is the only man who can o              the cut Ling machine in our factory.

3. The seat-belts on a plane are a           .

4. My mother bought a new pair of s            for me.

5. You s             eat any more pizza when you are thirsty.