问题补充:
---- I’m sorry I stepped outside for a smoke. I was very tired.
---- There is no for this while you are on duty.
A. reason
B. excuse
C. cause
D. explanation
答案:
A. reason
(答案→)B. excuse
C. cause
D. explanation
解析:根据第一个人的说法,他把“累”作为出去吸烟的“理由”,但下文指出“值班时间不应该擅离岗位”,在此情景中,任何“理由”或“解释”都该理解成“借口”,因此excuse最合适。