1) If you want to make more money you ......to work long hours. a) not have b) have c) must 2) Your computer has got a virus. You ........ use it because it will destroy all your files. a) mustn't b) don't have c) must 3) We ......... take our digital camera with us. We can borrow Charlie's. a) mustn't b) have to c) don't have to 4) Mary ......... study hard. She's taking an English exam tomorrow. a) have to b) has to c) had to 5) You're in a hospital. You ........ shout! a) must b) mustn't c) don't have to 6) Donald can't see well. He ....... wear glasses. a) doesn't have to b) have to c) has to 7) The students ....... to surf the Net to find the information they need for their project. a) has b) have c) must 8) I ...... wake up early at the weekend. There is no school. a) mustn't b) have to c) don't have to 9) People ...... talk on their mobile phone while driving. They can have an accident. a) must b) mustn't  c) don't have to 10) You ....... send invitations for the party. You can send emails to everybody. a) mustn't b) have to c) don't have to

Modal verbs must/ have to (prohibition/obligation/necessity/lack of necessity)

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