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4. What is the weather like in summer ?
5. How heavy is your father ?
6. Where do they stay ?
7. How long is the ruler ?
8. Whose pen is that ?
9. How long does it take him to go to school by bike ?
10. What is your phone number ?
11. When did you receive a letter from John ?
12. What does Minh usually do after getting up ?
13. How often do you brush your teeth ?
14. What time does Nga have an appointment this morning ?
15. What time does she go to bed ?