Time usually passes quickly when you are ________ your work.

Time usually passes quickly when you are ________ your work.
A、absorbed in
B、involved in
C、concerned with
D、indifferent to
【正确答案】：A
【题目解析】：be absorbed in专心于；be involved in被卷入......，涉及到......；be concerned with参与，干预；be indifferent to不在乎，对......莫不关心。句意：当你专心工作时，时间通常过得很快。