31. Ameriacan students have more vacations than Vietnamese ones.
32. You should wash your hands before meals.
33. The weather is good enough for them to go for a picnic./ The weather is good, so they are going for a picnic.
34. How heavy was Mr. Tan?/ How much did Mr. Tan weigh?
35. He takes care of sick people.
36. We haven't seen her since we were on holiday in Ha Long Bay.
37. Can you tell me how the stadium is?
38. We have music classes on Monday and Friday.
39. He is said to be the most intelligent student in the class.
40. His date of birth is on 2nd of October.