Completed would be the verb because it is an action
Answer: 1912.
Titanic's maiden voyage began shortly after noon on the 10th April, 1912.
The only element among these that are to be used in a formal letter are complex sentences.
As a matter of fact, idioms, contractions, and cliches should be avoided because they are very informal.
Historyguy can help he has verified answers and I can help too
Detective: J
Barrel: I
Deserted: D
Solve: A
Military: C
Investigation: H
Hoped i helped! :)