单项选择题
A. Hold the line B. flight number C. ask a question D. To New York E. May I have your name F. reconfirm my seat G. please check in H. On May 11th
A. learned boxing B. forgot all about his business C. raised the level of production D. shook his head all the time
A. represented a great improvement over barter B. permitted easy transportation of wealth C. were made of precious metals D. could become collector’ s items