1. I played a role in the meeting.

2. Family education plays a very important role in child rearing.

3. We play a role in our daily life.

4. Teacher play a very important role in students’ completing their schooling.

5. He play an important role in keeping up the morale（士气） of the soldiers.

6. A good student plays a role in the classroom.

7. WWF can play a role in protecting this endangered species.