question: the german boating licence (sbf see) is accepted as proof of competence.
Capitalize this past sentence correctly.
A: The German boating licence (SBF See) is accepted as proof of competence.

question: and hundreds of voices joined in the chorus:
Capitalize this past sentence correctly.
A: And hundreds of voices joined in the chorus:

question: desk research is used to create an overview of the knowledge that already exists on the subject.
Capitalize this past sentence correctly.
A: Desk research is used to create an overview of the knowledge that already exists on the subject.