Ex1:
1. Where's your key? I don't know. I have lost it.
2. Mary went to Australia for a while but she's back again now.
3. 'Where's Ken?'. He has gone out. He'll be back in about an hour.
4. Look! There's an ambulance over there. There has been an accident.
5. They're still building the new road. They haven't finished//have not finished it.
6. 'Is Helen still here'? No, she has just gone out.
7. The police arrested three people but later they let them go.
8. What do you think of my English? Do you think I have improved it ?
Ex2:
1.There's somebody walking behind us. I think we are being followed.
2. Every time I print a document, the printer is broken down.
3. Apples is said to be good for our health.
4. Hoa was born in Hue but she grew up in Hanoi.
5. “Is Thanh’s house still for sale?” – “No, it has seen sold since last month.”
6. The application form should be sent today so that I will arrive the next day.
7. How are cakes made ? Have you ever made ?
8. I saw an accident last night. Somebody called an ambulance but nobody was injured so the ambulance wasn't needed.
9. “Who invented the microphone?” “It was invented by D.E. Hughes in 1878.”
10. The printer was broken down down yesterday, but now it’s OK. It works again; it was repaired.
11. The professor is giving a speech on history at the moment.
12. A research has been done by the professor for three years.
13. An English-speaking club will be held in our school next year.
14. We are going to organize a workshop on environment this weekend.
15. Something is done in our city to improve living condition so far.
16. They took part in a contest last year.
17. We will go home with you then. Do you agree?
18. Flowers are cut in the morning to sell in the market
