Section V:
1. The dirt on vegetables can make you sick.
2. Scientists say that life started in the ocean.
3. He gave up smoking 2 years ago.
4. He is a fast runner. He runs fast.
5. Can I borrow your pencil? I'm sorry. I'm using it.
6. You should keep silent when they are working.
7. How many times a day do you brush your teeth?
8. Long is worried because he has to see the dentist.