根据句意和汉语提示，填写单词。

1. The knife is made of _________(金属).

2. Walter Elias Disney _________(创作) lots of cartoon characters.

3. Shall I write my answer above or _________(在……下面) the line?

4. While he was walking ________(朝着) me, I said hello to him.

5. I _________(敲) at the door, but there was no answer.