Make a conditional sentence 1. The sea is rough, and we can­not sail to the island. If … 2. They made a fire, and the frightened wolves ran away. If … 3. It is late, and I have to go home.If … 4. I was expect­ing my friend to come, that’s why I could not go to the cinema with you. If … 5. He always gets top marks in mathematics because it is his favorite subject and he works a lot at it. If … 6. I did not translate the article yesterday because I had no dictionary. If … 7. We lost our way because the night was pitch-dark. If … 8. The box was so heavy that I could not carry it. That’s why I took a taxi. If …

1. Unusual is the fact that all planets of the solar system in addition to ours bear the names of Greek and Roman mythology.

2. Earth as a planet appeared more than 4.5 billion years ago. Before the appearance of life on the planet from the birth of the Earth passed several thousand millions of years and relatively recently, according to geological standards, about four million years ago, people appeared.

3. If the history of the Earth is compressed to 24 hours, life would already have appeared at four in the morning, and ground plants at 10:24 pm. At 11:41 pm, as a result of a terrible catastrophe, dinosaurs would have died, and human history would only begin at 11:58:43 pm.

4. From astronomical point of view, the Earth occupies the most successful place in space for the birth and maintenance of life. The orbiting Earth is within the zone with the optimal temperature for the existence of water in liquid form, which, according to scientists, is a prerequisite for the existence of life forms.

5. According to various calculations by scientists in our Milky Way galaxy, there are more than 2 billion planets similar to Earth, which gives hope that we may not be alone in the infinite universe.