1066.When a gasoline engine's exhaust is black, it means: (A) Complete combustion. (B) Incompletecombustion. (C) Burning engine oil.

1070.Most automatic vehicles are front-wheel drive. When towing, in addition to releasing the parking brake,what method avoids damaging the transmission? (A) Lift the front wheels, rear wheels on the ground, towfrom the front. (B) Lift the rear wheels, front wheels on the ground, tow from the rear. (C) All four wheelson the ground, tow from the rear.