Ответ:
1. He has to work for this big joint venture.
2. She should not walk along this narrow dark street.
3. They can observe the bright stars in the blue sky.
4. You can help clean this big green flower bed.
5. I can translate this short text.
6. We can answer that question.
7. My brother has a task to accomplish.
8. His sister can wash the windows.
9. This girl should help you.
10. Her husband can play football very well.
11. This bus is more comfortable than that.
12. This lane is more narrow than that.
13. This beautiful avenue is the widest in the city.
14. This crossroad is the busiest in the area.
15. This building is the most beautiful in this street.
16. This teacher is the youngest in our Institute.
17. He’s the most famous musician in the town.
18. This theatre is as beautiful as that one.
19. He can jump as high as his brother.
20. The more we watch TV, the more information we get.