Rewrite the sentences using : must, must not, have to, don't have to, can, could, may, might, as in the example.
1/ It isn't necessary for you to wake up early tomorrow.
2/ It is OK if I borrow your pencil ?
3/ Is it possible for me to call you back later this the afternoon ?
4/ It's against the law to drive without a driver's license.
5/ I strongly advise you to apologize as soon as possible.
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