Change the following sentences into Yes/ No questions.
1. He is a farmer.
2. They use simple farming techniques.
3. I will read a documentary about ethnic groups of Viet Nam.
4. Nga plays the piano very well.
5. Women play an important role in a Jarai family.
6. She should do exercises regularly.
7. My father cooked noodles for me last night.
8. You may go out with your friends tonight.
9. We grow vegetables and raise livestocks.
10. Nam and his friends were in a stilt house last week.
