Ex 7:
1. given up smoking since last year.
2. spoken to her since they were at her party.
3. - seen my uncle for twenty years.
- saw my uncle nearly twenty years ago.
4. eaten such a delicious cake before.
5. I could go with you. / weren't busy today.
6. Dung didn't have to/ mustn't work on Saturday.
7. there weren't air pollution in her area.
8. it weren't in the winter so that he could swim.
9. we spoke English well./ we didn't speak English badly.
Ex8.
I am writing to tell you about my trip to Ha Noi last summer vacation. I went to Ha Noi with my classmates in only one day. It is about 80 km from my hometown, so we went by car. We set off at 5.00 am and arrived in Ha Noi City at 7.00 am.
It was a beautiful day with cool weather. Within one day, we visited some famous places such as HCM Mausoleum, The Temple of Literature and Thu Le Zoo. These attractions were quite close, so it was very convenient for us to look at them. We could do sightseeing, take a lot of photos for me and my friends. I bought some souvenirs for my family there. Besides, we enjoyed "Bun Cha", which is a special food. It was really delicious. However, the thing I was impressed by most was that I could see Uncle Ho the first time when I visited Ho Chi Minh Mausoleum and the friendliness of Ha Noi people.
We left Ha Noi at about 5 p.m and went home. We were a bit tired but we had a lot of fun. It was an exciting trip and I learned many things from the trip. I hope we will return Ha Noi again someday.
