19. how often do you go to the movie?
20. is he good at drawing?
21. when did John go to Viet Nam?
22. what is your mother doing in the kitchen at the moment?
23. does Lan like playing table tennis?
24. is it very hot in summer?
25. how much is your father weigh?
26. where do they stay?
27. how long is this ruler?
28. whose pen is that?
29. how many minutes does take him to go to school by bike?
30. what is your phone number?
