—I’m sorry I stepped outside for a smoke. I was very tired. —There is no______ for this while you are on duty. 
#7449
A
reason
B
excuse
C
cause
D
explanation
推荐题目
His mother was in hospital. He asked for ___ to look after his mother.
#6997
A
three-day’s sick leave
B
three day’s sick leave
C
three days’ sick leave
D
three-days’ sick leave