Do (something) by the …..

Can you complete this English expression? It means “to do (something) in accordance with the rules”.

Do (something) by the ……

a) book

b) pen

c) law

d) judge

The answer is below!↓

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Answer: a) book

Do (something) by the book!

Example: Jim is a good worker. He does everything by the book.

By I Talk You Talk Press – Easy English Reading