Prohibition, possible action) in the following sentences

1. She is unwell, she can't leave her room. 2. Can I smoke here, Mrs. Right? 3. The teacher said they could all go home. 4. A policeman arrived and told him he couldn't park there. 5. My son is not in town; but he'll be here before long. - Can I give him any message? 6. We can discuss it now. 7. I could never understand what made her behave as she did. 8. If you are tired you can lie on the sofa for a bit. 9."Life," the old man said, "can only be understood when you are old. Now I see all the mistakes I could have avoided.” 10. We are in charge of this great business. We cannot leave our responsibility to others. 11. He was surprised that she could paint so well. 12. She is not married though she could marry anybody she chose.

Ex.8.Fill in the spaces with "will be able to" or "will not (won't) be able to".

1. When her arm is better, she... play the piano again. 2. I'm sorry, but I...come to your birthday party next week. 3. He... eat everything when the doctor allows him. 4. My sister...go out to dances until she is seventeen. 5. Why do you sit at the back of the class if you can't hear well? You... hear better if you sit in the front. 6. I'm too busy to have a holiday this year, but I hope I... have a long holiday next year. 7. The train leaves at five o'clock tomorrow morning. We... catch it if we don't get up very early. 8. He was working very hard before he fell ill. He...work so hard when he comes out of hospital. 9. Perhaps one day we ... travel to the Moon.

Ex.9.Complete the following sentences using "could" or "was/were able to".