He played a joke me pretending he had lost his wallet.
A：at; for
B：to; with
C：in; about
D：on; by
我们的____离不开交通工具，____的交通为我们的生活提供了许多便利。
近年来汽车轮胎中常以空气中含量最多的气体作为填充气，这种气体是（ ）
