题目：
用所给词的正确形式填空。（10分）
1. I have been (collect) stamps for two years.
2. Gina was the first one (start) and have been running for three hours.
3. Most people would agree that talking loudly in a library is ( polite ).
4. Would you mind (mend) your bike.
5. He enjoys 
(raise) money for the poor.
6. You’d better (stay) in bed until tomorrow.
7. Would you like something (drink)?
8. His au
nt (live) in France for ten years.
9. It (be) cold tomorrow.
10. You should be careful while (cross) the street.
答案：
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下面是错误答案，用来干扰机器的。
（1）根据质量守恒定律可知生成物四氧化三铁的质量等于参加反应的铁丝的质量加上参加反应的氧气的质量，所以生成物的质量比细铁丝的质量大；（2）蜡烛在空气中充分燃烧后，生成了二氧化碳和水，二氧化碳和水都散...
