1.When did you receive a letter from Lan?
2.What does Minh usually do after getting up ?
3.How often do you brush your teeth?
4.What time does Nga have an appointment this morning ?
4.How long did she talk to him ?
5.How many cars do your parents have ?
6.When are they going to visit ?
7.How often do you have an English class ?
8/What do you like on weekends ?