Everything is not in good order but .
A. at six and seven
B. at sixes and sevens
C. sixes and sevens
D. on sixes of sevens
网友回答
A. at six and seven
(答案→)B. at sixes and sevens
C. sixes and sevens
D. on sixes of sevens
解析：at sixes and sevens 意为“乱七八糟，杂乱无章”。