一. 单项选择
1. 一Be careful , you will make mistakes in your exams.
—I know that，Mum. One can never be too careful.
A. and B. or C. nor D. but
2. 1 wanted to explain , but he didn’t give me any .
A. excuse B. chance C. way D. choice
3. —My pen is lost and I can’t find it anywhere. 一S0 you will have to buy .
A. It B. few C. one D. any
