1. Rice is grown in tropical countries
2. A new style of jeans has just been introduced in the USA
3. Jean cloth was made completely from cotton in the 18th century
4. Five million bottles of champagne will be produced in France next year
5. Two department stores have been built this year
6. This exercise must be done carefully
7. This problem can be solved
8. Experiments on animals should be stopped
9. Life might be found on another planet
10. All the schools in the city have to be improved