1) The exams are next week. I .............. work harder. a) mustn't b) must c) have to 2) You ............ cross the road without looking! It is dangerous! a) don't have to b) have to c) mustn't 3) We ............ go to school tomorrow. It's Saturday. a) don't have to b) have to c) mustn't 4) Visitors ........ feed animals in the ZOO. a) doesn't have to b) don't have to c) mustn't 5) In Britain you ......... drive on the left. a) must b) have to c) mustn't 6) People ........... be quiet in the library. a) have to b) has to c) must 7) You ......... use a mobile phone in the class. a) don't have to b) must c) mustn't 8) You .... watch this film! It is very good. a) have to b) must c) has to

MUST / MUSTN'T / HAVE TO / DON'T HAVE TO

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