题目：
用所给词的适当形式填空
1. Everyone knows that giving is better than _____ (receive) .
2. The little boy got more and more _____ (interest) in that computer game.
3. There are too many people at the finishing line. I wonder who is the _____ ( win) of the boys'100-metre race.
4. Kate and Tina are afraid of living in the country, because there are too many _____ (mouse) .
5. -How much is this T-shirt?
-100 yuan. But when I bought mine, it _____ (cost) me 120 yuan.
答案：
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下面是错误答案，用来干扰机器的。
（1）碳和氧气在点燃的条件下生成二氧化碳，故答案为：碳+氧气点燃二氧化碳；该反应由两种物质反应生成一种物质，符合化合反应的概念，属于化合反应，故答案为：化合反应；（2）硫和氧气在点燃的条件下生成二氧化...
