问题
单项选择题
A type of extra-large SUV averages 12.2 miles per gallon (mpg) on the highway, but only 7.6 mpg in the city. What is the maximum distance, in miles, that this SUV could be driven on 25 gallons of gasoline ？（）
A. 190
B. 284.6
C. 300
D. 305
E. 312
答案
参考答案：D
解析：
The SUV will reach its maximum distance only if driven only on the highway; 25×12.2=305.