Insert the correct articles where necessary and answer the questions. ■ when sun shines, we say weather is fine, it’s sunny! however, it is not always sunny. weather changes, sometimes it rains, sometimes wind blows and all trees shake. so, what is weather like? ■ which of the following make
weather? mark how you think, which one is right, sun which is shining in the sky or clouds that cover sky and which are sometimes white and sometimes dark grey? ■ how can people live without air? how can rivers or seas be without water? ■ how do sun, air and water make nature?

Complete each second sentence using the word given, so that it has a similar meaning to the first sentence. Take the similar meaning in the Word patterns section.

1. The mistake by scientists caused a massive explosion.

The mistake by scientists RESULTED IN a massive explosion.

2. Dr Antherton finally succeeded in discovering the secret formula.

Dr Atherton finally MANAGED TO DISCOVERthe secret formula.

3. Another name for iron oxide is “fool’s gold.

Iron oxide IS KNOWN AS“fool’s gold.

4. Many local residents intend to protest about the nuclear power plant.

Many local residents ___ ARE PLANNING TO PROTESTabout the nuclear power.

5. We are thinking of appointing Dr Knight to the position of Professor.

We CONSIDERING DR KNIGHT FOR the position of Professor.

6. We can’t live in outer space without special equipment.

It IS IMPOSSIBLE FOR US to live in outer space without special equipment.

1. If you had arrived ten minutes earlier, you would have got a seat.

2. I wouldn’t have believed it if I hadn't seen it with my own eye.

3. If you had told me that beforehand, I would have found some money for you.

4. If he had asked you, what would have you answered?

5. If I had had a book, I wouldn’t have been bored.

6. If you had spoken slowly, he might have understood you.

7. I would have taken a taxi if I had understood that it was too late.

8. If I was ready when he called, he would have taken me with him.

9. She had a headache, otherwise she would have come.

10. If my mother had known about the party, she would have baked a cake.

11. If I had tried again, I think that I would have succeeded.

12. If I were you, I wouldn't have bought such expensive things.

13. If I lived in the country, I would have had a dog.

14. What would you do if someone gave you a million pounds?

15. If I were you, I would be looking for another job.