1) You are able to leave early if you want to. a) can b) have to 2) It's necessary for you to get a visa for the USA. It's the law. a) have to b) can 3) It's not necessary for you to pay me back today. a) don't have to b) can't 4) Is it possible for my friend to come, too? a) can b) have to 5) Is it necessary to carry my student card with me? a) Do I have to b) can 6) It's not possible for you to see him at the moment. a) can't b) don't have to 7) It's not necessary to wear a tie, but you can if you want.  a) can't b) don't have 8) It's necessary for you to pay for the tickets now. a) have to b) can 9) It's not possible for you to bring dogs in here. a) don't have b) can't 10) You are able to work in the library all evening.  It's open until 10 p.m. a) can b) have to

Can, can't, have to, don't have to

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