At first driving requires a lot of concentration, but over time, it just bees _________．
A.authentic
B.available
C.automatic
D.awake
网友回答
C解析考查形容词辨析。句意：一开始驾驶需要集中精力，但是一段时间后就成为无意识的行为。automatic意思为“无意识的；不经思考的”，英语解释为done without thinking about it，这与题干中concentration(the ability to think carefully about something you are doing)相对应。authentic可靠的；真正的；available可用的；有效的；awake醒着的；清醒的。