听材料,回答问题。 1. Why can't the man see Dr. black now? A. Because Dr. Blackis busy. B. Because Dr. Black is out. C. Because Dr.Black can't see clearly. 2. When will the man go to see Dr Black? A. Tuesday afternoon B. Wednesday afternoon C. Monday afternoon. 3. When does this conversation happen? A. In the evening B. In the afternoon C. In the morning