1. The doctor is _________ (执行) an operation now.
2. He expressed it in the _________ (形式) of music.
3. They started to play their own _________ (乐器) and write their own songs like
   a real band.
4. I gave up because I didn't have any _________ (自信心) in myself.
5. Increasing numbers of people are _________(敏感的) to pollen (花粉).
6. After the lunch we parted, so I didn't know what happened to him a_________.
7. The boy sings so well that he dreams of being a m_________ tomorrow.