Put in can/can't if possible, if not use could or will be able to.
1. I think I... speak English quite well in a few months.
2. Dr Parker... see you at 12 on Tuesday.
3. It's quite fine, Clara, the rain has stopped. We... have a small walk.
4. I... tell stories, never....
5. The mountains were a long way away and we... see snow on their tops.
6. She... travel again in a few weeks.
7. If I practise a bit, I... be pretty good at tennis.
8. I'm free at the weekend, so you... come round.
9. They knew the town so they... advise him where to go.
10. Mary usually leaves work at six, but she... leave earlier on Fridays.
11. Do you think one day people... travel to the stars?
12. Since he was working at the hospital all day he... only learn in the evening.
13. In a few years, computers... think better than we do.
14. I'll post your letter, but I don't think the postman... read the address.
15. She... do your job with no trouble at all.
16. ... you believe the girl? ... it be true?
17. We... get in touch with him in such a short time.
18. I... come tomorrow, I'm afraid. I'm too busy.
19. This week isn't good, but I... bring the car in next week.
20. I... hear Miss Graham's voice, but I... hear what she said.