question: "oh, how dreadfully lonely he must have been," said she.
Capitalize this past sentence correctly.
A: "Oh, how dreadfully lonely he must have been," said she.

question: for parameter setting and analysis of units with dtm specification
Capitalize this past sentence correctly.
A: for parameter setting and analysis of units with DTM specification

question: there are different roulette systems, which have been devised over the time of players.
Capitalize this past sentence correctly.
A: There are different roulette systems, which have been devised over the time of players.