1) Young children ..................be with an adult when they go into the swimming pool. a) can't b) have to 2) The water bottles are for free, you ................have one if you like. a) must b) can 3) You .............go to school on Saturdays a) mustn't b) don't have to 4) I have an important meeting today, I ...........be late. a) mustn't b) don't have to 5) There's plenty of time so, we ...........hurry  a) have to b) don't have to

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