Definition: gas, a liquid fuel for cars and trucks Level: B2
美国的大多数汽车使用无铅汽油。
Most cars in the US use unleaded ___gasoline.
实际上，我们知道汽油很贵。
Actually, we know that ___gasoline is very expensive.
我们需要给油箱加满汽油。
We need to fill up the tank with ___gasoline.
