13. Prior to filling up the fuel tank:
(A) you are required to turn off your engine
(B) you don't have to turn off your engine
(C) it doesn't matter whether you turn off your engine or not.
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統計: A(5), B(0), C(0), D(0), E(0) #2214474
統計: A(5), B(0), C(0), D(0), E(0) #2214474