問題補充：
單選題
At first driving requires a lot of concentration, but over time, it just becomes _________．A.authenticB.availableC.automaticD.awake
網(wǎng)友答案：
熱心網(wǎng)友 1樓
C解析考查形容詞辨析。句意：一開始駕駛需要集中精力，但是一段時間后就成為無意識的行為。automatic意思為“無意識的；不經(jīng)思考的”，英語解釋為done without thinking about it，這與題干中concentration(the ability to think carefully about something you are doing)相對應。authentic可靠的；真正的；available可用的；有效的；awake醒著的；清醒的。
