Tell me how it came about that you were 20 minutes late for class. You needn’t go into details.
A. in advance
B. in brief
C. in total
D. in vain
网友回答
A. in advance
(答案→)B. in brief
C. in total
D. in vain
解析：A. in advance提前 B. in brief简洁的 C. in total 总计 D. in vain徒劳的；句意：简洁的告诉我你是怎么迟到20分钟的。你没有必要告诉我细节。故选B