27. Ba is tired because he stayed up late watching TV.
28. Tet is a festival which occurs in late January or early February.
29. I am going to be late for school since the bus is late.
30. Even though Lis has an exam tomorrow, she still watching TV.
31. Do you understand the word which the teacher wrote on the board?
32. Ba who likes playing the guitar lives on Trang Tien Street.
33. Even though it was only the first time they met, they made friends immediately.
34. The planet that is closest to the Earth, is Venus.
35. Nancy who lives next door is very lovely.
36. Although the traffic was bad, I arrived on time.
37. We did not go camping so the weather was bad.
38. If we plant more trees along the street, we will have more shade and fresh air.
39. The man who was giving a talk on saving energy was a famous expert.
40. I am studying very hard because I want to get good marks.