1.   You look really tired. You _________ take a few days off and have a holiday.       a. should                      b. must                        c. have to                     d. can 2.   In Vietnam, you _________ take a deep bow as you do in Japan.       a. mustn’t                    b. don’t have to           c. should                      d. shouldn’t 3.   Sorry, but my train is at 6.00. I _________ leave now.       a. shouldn’t                 b.ought to                    c.mustn’t                     d. have to 4.   You _________ look’ at other students’ work. It’s against the rules.       a. shouldn’t                 b.don’t have to            c. mustn’t                    d. can’t 5.   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 6.   John can’t come because he _________ work tomorrow.       a. should                      b.can                            c.must                          d. has to 7.   I know they enjoy their work, but they ______ work at the weekends.It’s not goodfor them.       a. shouldn’t                 b.don’t have to            c. mustn’t                    d. have to 8.   Elderly people _________ be treated with great respect       a. shouldn’t                 b. should                     c.aren’t obliged to       d. mustn’t 9.   He _________ use chopsticks for spring roll. It is finger food.       a. must                         b.has to                        c.doesn’t have to         d. should 10. 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 11 . ‘ We don’t sweep the floor on the first day of Tet.’ ‘_________ Why?’       a. What a bad day!      b. You’re kidding!      c. You’re right.            d. Spot on!