请听下面一段材料,回答第1至3题。 1. Who is probably the woman? A. Johnson’s wife. B. Johnson’s neighbor. C. Head of the Science Department. 2. What’s the matter with Johnson? A. He can’t find his office key. B. He has lost his voice. C. He doesn’t like his class. 3. What favor does Johnson want someone to do for him? A. Mark the latest homework. B. Put a notice on the classroom door. C. Return some exam papers to his students.