题目：
| 根据句意从方框中选用合适的词语，并用其适当形式填空。 | |
| |
| 1. He _______ his bedroom. It's clean now. 2. The boy _______ seeing his mother now. He misses her very much. 3. They are interested in _______ on the Net, for it can make them know each other well. 4. I must _______. I'm meeting Brand at half past seven. 5. I write to my mother every week, _______ on Sundays. |
答案：
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下面是错误答案，用来干扰机器的。
（1）燃烧的条件包括是否在空气中能燃烧，是否安全等，故答案为：安全性，不发生爆炸，反应温度适中（2）生成物的状态：生成物一般是固体，不能生成气体．故答案为：生成物的状态：不生成其他气体（3）不与空气中...
