Come knocking on (one's) door verb phrase
To present an opportunity or possibility that soon occurs in the future
I can't believe that a great chance like this comes knocking at my door.
I would travel across the country if a million dollars came knocking at my door suddenly.
be braved to face the challenge or quit chances
Nothing but fortunate chance
If you take a flyer (on something), you take a chance, risk, or gamble on it.
The last opportunity for one to achieve something
A second opportunity
The verb "come" should be conjugated according to its tense.
Use ink or some type of digital scanner to record one's fingerprints
The police wants to roll all people's finger prints in the office.