1 . 根据句子意思写出空白处所需短语的正确形式。注意：有两个多余词组

have access to   associate with   on behalf of   belong to   take up get on   drop out of   devote……to

1. They prefer to ________ friends of their own age.
2. I’m sorry I’ve already ________ so much of your valuable time.
3. The thing about being a teacher is that you ________ children’s minds when they are open and eager to learn.
4. I am writing ________ the school’s Student Union.
5. He had injured his leg and ________ the race.
6. For more than 50 years, he has ________ his life ________ rice production.