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.