根据句意，用括号中所给词的适当形式填空。
1. Computers are used by people for _____ problems. (do)
2. Spaceship _____ people have reached other parts of the universe. (with)
3. Britain is only 30 kilometers away from _____. (French)
4. I think English is _____ than math. (important)
5. The Great Wall is over six _____ kilometers long. (thousand)
6. The hat was _____ of silk. (make)
7. The moon _____ round the earth . (travel)
8. Sheep are _____ by farmers for producing wool and meet. (keep)
9. Do you know the boy _____ his hand towards us? (wave)
10. Everyone is supposed _____ a seat belt in the car. (wear)
转换成程序设计中的表达式为 【2】 。
