1) I think you _________ visit your grandmother more often. a) can b) must c) mustn't d) should 2) Look at the sign- you ________ smoke here. a) can't b) shouldn't c) mustn't d) couldn't 3) All right, we are finished. We _________ take a break now.  a) shouldn't b) can c) must d) could 4) It's not a good idea, you ________ eat all those sweets. a) shouldn't b) mustn't c) couldn't d) can't 5) You ______________ steal. a) mustn't b) can't c) shouldn't d) must 6) It's very hot outside, you _________ drink a lot of water. a) can b) could c) should d) must 7) You _________ bring a sandwich, there is no restaurant where we are going. a) should b) could c) can d) must 8) It's o.k, you _________ take a day off tomorrow. a) should b) can c) must d) can't 9) You ___________ tell Adam about the party, it's a surprise. a) shouldn't  b) mustn't c) can't d) can 10) You look tired, I think you __________ rest now. a) must b) should  c) shouldn't d) can't 11) My sister __________ play tennis. a) can b) could  c) should d) must 12) The student ___________ leave the class in the middle of the lesson. a) can b) should c) mustn't d) could 13) He __________ study more, he didn't do well on the test. a) must b) can't  c) should  d) could

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