4. Why was Bob so late?
A. Because he was caught in a traffic jam.
B. Because his pens and notebooks were taken away by a crowd of people.
C. Because he joined a crowd of people to get a signature.
5. How does Mary feel when she looks at the signature?
A. Disappointed.
B. Surprised.
C. Puzzled.
6. What is Yao Ming?
A. A pop star.
B. A known politician.
C. A basketball player.