1)i found the photo by chance when i was tiding my room (accross) the photo when i was tiding my room 2) fridges and freezers are not the same thing. (difference) fridges and freezers. 3)scientists should never invent their results (made) results should scientists
3. At the time the factory closed down, Sarah had been working there for five years.
4. The orchestra had been playing for ten minutes when a man in the audience suddenly began shouting.
5. I had been walking along the road for five minutes when I saw a monster.
16.3
1. It was very noisy next door. Our neighbours were having a party.
2. We were good friends. We had known each other for a long time.
3. John and I went for a walk. I had difficulty keeping up with him because he was walking so fast.
4. Mary was sitting on the ground. She was out of breath. She had been running.
5. When I arrived, everybody was sitting round the table with their mouths full. They were eating.
6. When I arrived, everybody was sitting round the table and talking. Their mouths were empty but their stomachs were full. They had eaten.
7. Jim was on his hands and knees on the floor. He was looking for his contact lens.
8. When I arrived, Kate was waiting for me. She was rather annoyed with me because I was late and she had been waiting for a very long time.
9. I was sad when I sold my car. I had had it for a very long time.
10. We were extremely tired at the end of the journey. We had been travelling for more than 24 hours.
2. There are a lot of museums and theatres in our city.
3. Is there a telephone in this room?
4. There are two windows in this room.
5. There was no tea in the cup.
6. How many articles were there in this magazine? - There were several articles there.
7. How many students are there in the classroom? - There are twenty.
8. There will be a park close to our house.
9. Was there a school on this street?
10. There are several books on the table.
11. There is a school near our house. The school is situated close to our house.
12. There are a number of theatres in the city. Theatres are situated in the city centre.
13. There were flowers in the vase. The flowers were in the vase.
14. There are a lot of children in the theatre. The children are in the theatre now.
15. There are a number of ways to solve this problem. The ways of this problem solving are on page 5.