1) You ____________ be quiet in the library. People are studying! a) can't b) must c) has to 2) You ________________ have a passport to travel abroad. a) have to b) don't have to c) mustn't 3) Sally _____________ play the piano very well. She is really good at it. a) mustn't b) doesn't have to c) can 4) Sam ______________ take a pain killer because he has a headche. a) should b) can't c) mustn't 5) You _______________ water the flowers because it's raining. a) have to b) mustn't c) don't have to 6) __________ I use your laptop please? a) Must b) Should c) Can 7) Megan _____________ clean her room. It's a mess! a) have to b) has to c) can 8) I ______________ go out tonight. I'm babysitting my little cousins. a) have to b) couldn't c) can't 9) Not all birds ____________ fly. a) have to b) can c) must 10) We ______________ recycle to save the planet! a) must b) can't c) shouldn't 11) You _______________ eat candies. They are not good for your health. a) mustn't b) can't c) shouldn't 12) When I was six, I ______________ ride a bike. a) can b) have to c) could

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