单项选择题
A. January B. April C. June D. August E. November
A. Between 6.5 and 7 mph B. Between 5.5 and 6 mph C. Between 4.5 and 5 mph D. Between 3.5 and 4 mph E. Between 2.5 and 3 mph
A. 18 million B. 19 million C. 20 million D. 21 million E. 22 million