=Put the modal verbs can or may=
1…. I come in?
2. I ...not swim because until this year the doctor did not allow me to be more than two minutes in the water.
3. Libraries are quite free, and anyone who likes…get books there.
4. Only a person who knows the language very well… answer such a question.
5. What time is it? – It…be about 6 o’clock.
6. I… come and see you tomorrow if I have time.
7. …you help me?