1) you......be careful a) must b) musn't c) do d) does 2) he .........pay your taxes a) do b) does c) must d) musn't 3) we......... run at school a) must b) musn't c) can d) can't 4) he.......... pay your taxes a) must b) musn't c) do d) can 5) she .........learn french a) must b) musn't c) do d) does 6) he..........has to eat less a) must b) musn't c) do d) does 7) parents........ take care of their children a) must b) musn't c) can d) can't 8) she............forget her books a) must b) musn't c) do d) does 9) we ...........work harder a) must b) musn't c) can d) can't 10) you ............ shout in the library a) must b) musn't c) do d) can

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