听下面一段材料,回答1-3题。 1. What was the teacher doing? A. She was researching the animal's language. B. She was giving a biology lesson. C. She was asking the students to read an article. 2. Who killed the flying bee finally? A. The speaker B. Helen C. The boy 3. How did the students feel when hearing the teacher's words? A. Unhappy B. Astonished C. Excited