一、单项填空（共40分，每小题1分）
从下面各题所给的A、B、C、D四个选项中，选择可以填入空白处的最佳选项。
1. — How long can I __________ the book?
— You can give it back to me when you finish reading it.
A. borrow B. lend C. keep D. buy
2. — Why don’t you take the MP3, Peter?
— I have only $ 5. I can’t _______it.
A. spend B. cost C. afford D. pay
