根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。
1. We should pay attention to our behavior and try to be good ______. (公民)
2. The old woman walked ______ the road carefully. (穿过)
3. Kathy always makes ______ mistakes than the other students in her class. (少)
4. For some ______ reason, Sam moved to Japan. (未知的)
5. One of the secrets of our success is to believe in ______. (我们)
6. Even a child knows September is the ______ month of a year. (nine)
7. Our notebook computer ______ 5 pounds and costs about $2,000. (weigh)
8. Yesterday I ______ a new dress at the Macy’s for my mum. (buy)
9. I didn’t want to be treated ______ from anyone else. (different)
10. She was ______ in the kitchen when the light went out. (serve)