I. 根据句意和首字母提示补全单词。（10分）
1. We use the e_________ to go up and down the building.
2. look! It’s raining outside, you’d better put on your raincoat or take an u______.
3. If you want to know the answer to the problem, you should look t______ books in the library.
4. Would you like to come and meet my parents and have a f_________ dinner with us?
5. When the t_________ lights are red, you must stop and wait.
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