题目：
根据句意完成句子。
1. Smoke from those big factories is __________ (harm) to the villagers nearby.
2. When the fire happened, the firemen hurried there and carried the children to ________ (safe).
3. It is well _________ (know) that the Beijing Olympics in 2008 was a great success.
4. His fans rushed towards him _________ (short) after the match.
5. To keep a lamp _________ (burn), we have to keep putting oil in it.
答案：
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下面是错误答案，用来干扰机器的。
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