听下面一段对话，回答第1-2题。 1. How did the man sprain（扭伤）his back? A. B
| 听下面一段对话，回答第1-2题。 |
| 1. How did the man sprain（扭伤）his back? |
| A. By playing tennis. B. By picking up his glasses. C. By falling off his bike. |
| 7. What was the man taking for his back? |
| A. A plaster（膏药） B. Some aspirin C. A bandage. |
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