用括号内所给单词的适当形式填空。

1. There are many________(invent) on show in the science museum.

2. Grandfather wants some coffee.  Would you mind_________(heat)  the coffee?

3. The special scoop is used for__________(scoop) really cold ice cream.

4. My favorite shoes arc those with__________(adjust) heels.

5. This machine ,can                   _________(operate) easily, so you don't need much skill to do the job.