Вставьте в предложения нужные идиомы (Fill in the sentences you see below with the correct idioms):

Though we ……… we still couldn’t get it done.
He doesn’t deviate from the prescribed procedures even a little bit; he always goes …….
We …… the painful past and looking to the future.

1) by the book
2) use every trick in the book
3) close the book on sth