【题目】He had been so absorbed __________ watching the car passing by that he didn't notice his friends __________.
A. to；coming B. in；to come C. on； coming D. in； coming
在线课程【答案】D
【解析】本题考查短语及句型搭配。be absorbed in全神贯 注于；notice sb. doing sth. 注意到某人在做某事。句意： 他很专注地在观察过往车辆以至于没有注意到朋友的 到来。