1. The scientists do experimental work on animals.
2. The doctor made advances in the neurological field.
3. The austronaut had a successul mission in space.
4. The archeologists made an important discovery this week.
5. My teacher made an important observation on my homework.
6. Our chemists did some ground-breaking research on the mater.
7. My mother had a life changing experience when she had an accident.
8. The doctors have evidence of his illness.
9. The magician held a demonstration in front of the audience.
10. Our president tries to make a change for the better.
11. The biology teacher asked us to do a scientific project.
12. Our school will hold an international conference on health.
