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1. If there are a few firms in an industry, the change in the behaviour of one firm can influence other firms. 2. Can developing countries enter the European Union? -No, they can't. 3. The firm may increase its profits by means of new materials or technologies.
4. Any crisis in the economy of the USA can seriously influence the economies of other nations. 5. Any country must follow some rules in international trade. 6. Can Russia supply its population with necessary amounts of gas and petrol?- Yes, it can. 7.British farmers could not ensure the required quality of meat when there was an infection among animals a few years ago. 8.You must have a special licence to import or export exotic animals.

1. I have read a lot of books.

2. My dad has gone to work 2 hours ago.

3. I have already seen "Harry Potter".

4. I played volleyball when I was younger, but I don't play now.

5. I was ill four months ago.

6. I haven't been here since graduation.

7. I have had a dog for eight years. Its name is London.

8. Meghan has been absent since Monday.

9. I finished my homework.

10. We went to the seaside last summer.

2.

1. I have already read this magazine and I don't want to read it again.

2. Scientists still have not found a cure for cancer.

3. The first modern Olympics took place in Athens more than a hundred years ago.

4. Steven never eats sushi.

5. I worked as a shop assistant two years ago.

6. Tom Hanks has won an Oscar several times already.

7. Have you ever worked in a shop?

8. Have you seen any good films recently?

9. How many symphonies has Beethoven composed?

10. A bus came round the corner and he jumped out of the way.

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