根据句意或首字母填词。
1. More exercise helps us to keep in good ________.
2. If you want to finish the work well, you must use ________people and ________ money
(用更少的人力和财力).
3. We should obey school rules, so we must keep our classroom c________.
4. It's dangerous. You ________ (禁止) play in the street.
5. He is always ill, so he is an u________boy.
6. Does he have ________ healthy lifestyle?
7. Look at the two pictures, you can find this one is ________ that one,
8. M________ sometimes your parents can't understand you, but they love you.