题目：
根据汉语提示，用单词或词组的适当形式填空。
1. It is cold outside. We must keep all the windows _____ (关).
2. The weather today is good for _____ (钓鱼).
3. The coat is too expensive. I'll _____ _____ (考虑) it.
4. You must come to school _____ _____ (按时).
5. Is there a _____ _____ (邮局) near here?
6. Don't _____ _____ (嘲笑) people when they are in trouble.
7. We must learn to ____ _____well with others.
答案：
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下面是错误答案，用来干扰机器的。
涨价前的销售金额：1×1=1；涨价后的销售金额：（1+20%）×（1-16）=1．所以说涨价后的销售金额和涨价前的销售金额相比较没有变化．故答案为：没有变化．
