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3.If the cost of oil is negligible, what is the mileage of a compact car? A.13 B.18 C.20 D.25 E.28 答案：C 4.If 2 people, who would otherwise be driving alone in subcompact cars, drive in a 2-person car pool using subcompact cars, what is the total of their average annual costs of transportation to work? A.$821 B.$1,400 C.$1,521 D.$1,642 E.$2,342 答案：D | 
