1) You _______be an expert to use the basic functions of program. a) must b) don't have to c) shouldn't 2) My advice is that Mary______ tell the truth. a) has to b) must c) should 3)  Jose doesn’t have money so he ________ go to the bank. a) has to b) must c) should 4) You ________ swear in the kids area. a) shouldn't b) mustn't c) don't have to 5) Mario ________ work a lot. He has to support his children and his wife. a) have to b) must c) has to 6) Children under 3 ________ enter the pool withouth supervision. It is dangerous. a) do not have to b) must c) must not 7) We _________ get up early because tomorrow is Monday. a) didn't have to b) must c) had to 8) I _________ tell lies to be at peace with myself. a) should b) mustn't c) shouldn't 9) We _________be polite to other people. a) have to b) should c) must 10) I _______wear glasses, I still can see perfectly well. a) should b) don't have to c) don't have 11) I ____________ my best if I want to succeed. a) have to b) should c) must do 12) You ________ feed the animal in the zoo, it is prohibited. a) shouldn't b) musn't c) don't have to

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