33. It took four hours to fly from Ho Chi Minh city to Bangkok.
34. If you don't practice speaking English every day, you cannot improve your English.
35. My mother isn't used to going to work without having breakfast.
36. Kjell Lindgren, who is replacing items inside the ISS, is a NASA astronaut.
37. This English course that concentrates on developing communicative skills is very helpful for me.
38. The quality of life in the countryside has considerably improved.

39. When we arrived, the bus left.
40. How long have you broken your leg?