`Ex9`
1. Road safety.
2. Safety helmet.
3. Railway station.
4. Traffic jams.
5. Zebra crossing.
6. Road user.
7. Driving license.
8. Speed limit.
9. Means of transport.
10. Train tickets.
`Ex1:`
1. I used to live in Paris, but now i live in Rome.
2. He used to have a lot of money, but now he doesn't.
3. Peter used to play guitar 2 years ago, but now he plays violin.
4. I used to eat sweets when i was a boy.
5. Sarah used to bit her nails whan she was a child.
6. There used to be some trees here but now there aren't.
7. We used to get into the habit of swimming everyday before breakfast.
8. He used to go to the cinema regularly, but now he doesn't.
9. Her custom used to get up early and have a bath every morning.
10. It used to be his custom to get up early.
`Ex2:`
1. Mr and Mrs Smith are travelling to Ha Noi by plane now
2. Van used to have a motorbike , but he doesn't any more
3. My father usually drive a car to work
4. This part of the city didn't use to have traffic jams very often
5. I used to go to school on foot when I was young
`Ex3:`
1. Traffic jam is one of the most common issues in big cities in the world
2. There are many people using roads and it is one of main reasons cause traffic jam
3. We can solve this traffic problem by encouraging people to use bicycles rather than cars in short trip
4. People should use public transports to reduce the number of private vehicles on the road
5. Moving big companies and factories from the city to the countryside will help reduce the traffic jam