Помогите с домашним заданием по английскому, срочно, 9 класс. Modal verbs

Exercise 3. Fill in the spaces choosing the correct form of be able to.
1. She ___ play any games since her illness.
2. He fell into the river. He would have been drowned if he ___ swim.
3. She didn't get the post. She would have got it if she ___ speak at least two foreign languages.
4. Her parents are poor, and she ___ buy a new dress for two years.
5. I've got a terrible cold and cough. I ___ go out for a week.
6. They asked me, "How long ___ you ___ drive a car?
7. I play the violin well. I ____ play since I was five.
8. My sister ___ go out in the evenings since she had a baby. She has to stay in and look after the baby.
9. The teacher asked me if I had read the article and if I ___ understand it.
10. Two students told the professor they were sorry but they ___ do all their homework.
11. The little boy ran across the road without looking. The car would have knocked him down if the driver ___ stop in time.
12. His parents don't give him any money. He ___ support himself since he left the university.
13. She would have passed the examination if she ___ answer all the questions, but she couldn't answer three of them.
14. I visited my uncle two years ago, but I ___ visit him since then.
15. He told the doctor that he ___ sleep well for over a month and that he felt very tired.
16. Jane ___ cook very well since she took cooking lessons.
17. I answered the inspector's question and said, "I ___ drive a car since 1995"
18. My grandfather ___ walk without a stick since he fell down and broke his leg.
19. Tom wouldn't have lived on a farm all his life if he ___ get a good job in a city.
20. The senior official said, "I work hard. I_____ never ___ have more than a fortnight's holiday a year.

Exercise 7. Ask permission using the suggested list of phrases.

You want...
1. ..another chocolate. - Can I have another chocolate?
2. … to watch a television programme while I'm reading.
3. ..to use his telephone.
4. … to ask her about her plans for tomorrow morning.
5. … to borrow her computer.
6. … to smoke in the classroom.
7. ..to open a bank account.
8. ..to know about places of interest to see in the town.
9. … to leave early from work.
10... to stay at the most expensive hotel in town.