Сделайте данные предложения вопросительными.

1. I may open the window.

2. Children and adults must clean their teeth twice a day. (How often ...?)

3. Children must go to school. (Where ...?)

4. You should keep your room tidy. (What ...?)

5. They should be polite.

1. I may open the window.

2. Children and adults must clean their teeth twice a day. (How often ...?)

3. Children must go to school. (Where ...?)

4. You should keep your room tidy. (What ...?)

5. They should be polite.

1 May I open the window?

2 How often must children and adults clean their teeth?

3 Where must children go?

4 What should you keep tidy?

5 Who should be polite?