听下面一段材料, 回答第1至3题. 1. How was the land when the man's father bought it? A. It had very few animals on it. B. It had been opened up by others. C. It was full of many native animals. 2. How long did it take the land to have a great change? A. 4 years. B. 10 years. C. 14 years. 3. What brought about such great changes? A. The damaged environment. B. The people living there. C. The cats and the foxes. 4. What did the people believe to be the problem then? A. The land. B. The farmers and miners. C. The animals.