In order to learn the of the family business, Bill took a job as messenger boy in one of

In order to learn the of the family business, Bill took a job as messenger boy in one of the offices.
A. ins and outs
B. dos and don’ts
C. heads and tails
D. t’s and i’s

(答案→)A. ins and outsB. dos and don’tsC. heads and tailsD. t’s and i’s解析：ins and outs 意为“细节”，dos and don’ts 意为“注意事项”，heads or tails 为掷钱币打赌时用语，意为“你赌正面还是赌反面”，p’s and q’s主要用于 mind one’s p’s and q’s，意为“留意自己的言行”。结合句意，选A最合适。

对的，就是这个意思

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