Ответ:
1) 1. If he has a lot of money, he will buy a computer.
2. The train leaves at 10.30. Hurry up.
3. I think the earth will be very pollured in 2100.
4. They will probably come later.
5. When the rain stops we will go to the park.
2) 1. Have you seen Ann recently.
2. I lost my key, I can't open the door.
3. We have met with our friends last weekend.
4. The plain has landed 20 minutes ago.
5. How long have they known each other?
3) 1. This jacket is small for me. Show me a bigger one.
2. A train is faster than a bus.
3. What is the most interesting thing in life?
4. Gred felt worse yesterday than the day before.
5. John isn't so taller than Kevin.
4) 1. I met Tina in Spain, aren't me?
2. There is nothing in the box, isn't there?
3. Mother cooks very well, doesn't she?
4. Kate, you can ride a bike very well, aren't you?
5. Jane isn't leaving for London in the evening, is she?
5) 1. I have read this book for three days.
2. My classmates have been writing a dictation since the beginning of the lesson.
3. I have known her for six years.
4. I haven't watched this video yet.
5. Look! It is wet outside. It has been raining.