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 |
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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 |
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