40. The airline only allows two pieces of luggage. You _________ pack too much!

          A. shouldn’t                B. mustn’t                   C. don’t have to       D. couldn’t

41. John can’t come because he _________ work tomorrow.

          A. should                     B. can                           C. must                      D. has to

42. I know they enjoy their work, but they______ work at the weekends. It’s not good for them.

          A. shouldn’t                B. don’t have to          C. mustn’t                 D. have to

43. Elderly people _________ be treated with great respect

          A. shouldn’t                B. should                     C. aren’t obliged toD. mustn’t

44. He _________ use chopsticks for spring roll. It is finger food.

          A. must                        B. has to                      C. doesn’t have to    D. should

45. Everyone _________ wear a helmet when riding a motorbike. It’s mandatory according to traffic law.

          A. isn’t allowed to      B. must                        C. can                        D. shouldn’t

46. It’s Vietnamese tradition to_____ with families at Tet.

A. back                         B. reunite                   C. relate                     D. bow

47. In American culture,_____ is very important.

A. punctual                  B. punctually C. punctuality           D. punctualities

48. Language, religion, food and art are just some_____ of the various aspects of culture.

A. features                   B. faces                      C. ways                      D. products

49. Shoes must always be removed before_____ a Japanese home.

A. entrance                  B. enters                    C. enter                      D. entering

50. In Russia, Father Frost brings presents for children_____ New Year’s Day.

A. in                              B. on                           C. At                           D. for