33. We have been studying English since we were at grade 3.
34. If Ba learned harder , his marks at school would be better.
35. Daisy invited Mary to come and see them whenever she had free time.
36. Music is being listened by the children now.
37. This is such an interesting book that I have read it twice.
38. I will give you a call as soon as I have finished my work.
39. The villager are trying to learn English in order to communicate with foreign customers.
40. The children are looking forward to visiting Hue next week.