5use the modal verbs must, can/may, can’t. 1) i'm not quite sure where to go for my holidays but i … go to the usa. 2) you can tell tom what i said but he … keep it a secret. 3) if you're under 18, you … drive a car in russia. 4) you … drive for a year in britain with an international license.
2. can't keep
3. mustn't
4. may