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.