请听下面一段材料, 回答第1至3题。 1. What will be discussed at t
| 请听下面一段材料,回答第1至3题。 |
| 1. What will be discussed at the conference? |
| A. Water pollution. B. Food pollution. C. Air pollution. |
| 2. How long will the conference last? |
| A. One month. B. A fortnight. C. Seven days. |
| 3. What is the man? |
| A. A scientist. B. A writer. C. A traveler. |
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