1. Complete the text. Use can, can’t, could, be able to, must…

1. I’m afraid I CAN'T help you at the moment.2. I don’t think I’ll BE ABLE TO come to the meeting.3. The negotiations broke down because we COULDN'T agree on the price. 4. I MUST remember to email Steve and thank him for all his help.5. Sorry, I CAN'T go now, the meeting begins in five minutes.6. You HAVE TO try to be more diplomatic when you are speaking to Tim.7. I find Portuguese very difficult. I CAN'T understand it, but I WILL HAVE TO Speak it.8. — Will you BE ABLE TO go to the training seminar? — No, I CAN'T. I’m very busy.9. I’m sorry. I COULDN'T come to your talk yesterday. I had to sort out a problem.10. I HAVE TO go to the dentist next Friday morning, so I’ll be a little later.