1.What are the two speakers talking about?
A.A method. B. A theory. C. A rule.
2. What does the woman mean?
A. She agrees with the man.
B. Life cannot exist without sunlight.
C. Air is fundamental to all living things.
3. Why does the woman mention her dinner guests?
A. To invite the man to join them.
B. To ask the man to help cook.
C. To suggest politely that the man leave.
