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| Riddles ＆ Answers | |
| 引用本文： | 连琴.Riddles ＆ Answers[J].中学英语园地,2003(8):11-11. |
| 作者姓名： | 连琴 |
| 摘 要： | 1)—What is the most useful thing when it is used up? —An umbrella.2)—You can’t buy it in a store.It’s delivered to your house,and you use it every day.What is it? —Electricity. |
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