1. Teachers should learn various techniques(技巧)for dealing with problem students.
2. This seems, therefore, to be an approach(方法) worth exploring.
3. What’s uncertain is precisely how it will emerge(出现).
4. The same principle applies to our vocal (嗓音的)chords.
5. He only lay without movement(运动).
6. She started dancing to the rhythm(节奏)of the music.
7. I think that the art of a storyteller is to take the story and improvise(即兴表演) on it.
8. Union membership and union power are declining(下降).