问题补充：
---Tom was late for class this morning again.
---You know, .
A. all good things come to an end
B. a leopard cannot change its spots
C. honesty is never too much practical
D. a work ill done must be twice done
答案：
A. all good things come to an end
(答案→)B. a leopard cannot change its spots
C. honesty is never too much practical
D. a work ill done must be twice done
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