用所给单词的适当形式填空

1. They refused to give any interviews to __________(journal).

2. Edison won his spurs as an __________(invent) while rather young.

3. The piece of bamboo makes a __________(music) sound.

4. My parents are worried about the __________(safe) of me all the time.

5. The air was __________(pollution) by factory smoke.