TheUnitedStatesisfullofcars.Therearestillmanyfamilieswi...
问题详情：TheUnitedStatesisfullofcars.Therearestillmanyfamilieswithoutcars,butsomefamilieshavetwoormore.However,carsareusedformorethanpleasure.Theyareanecessarypartoflife.Carsareusedforbusiness.Theyared...