听下面一段材料,回答第1至3题。 1. How many rocks has the man collected? A. About 6. B. About 16. C. About 60. 2. Why is the man most interested in collecting rocks? A. He thinks collecting rocks takes little time. B. He likes rock’ interesting shapes and colors. C. He believes it is a good way of making friends. 3. Where are the man’s rocks kept? A. In the living room. B. In his study. C. In his bedroom.