1. What did you receive from Lan last week?
Who did you receive a letter from last week?
When did you receive a letter from Lan?
2. How often do you brush your teeth?
3. What time does Nga have an appointment this morning?
4. Why do you like "Tom and Jerry"?
5. When did you go to disco with your friend?
Who did you go to disco with last night?
6. What did she worry about?
7. What is she learning?