From our, "There's a right way, and then there's other ways," file...

Tower: Cessna XXX cleared to land 20.

Cessna: Cleared to land 20.

Tower: Cessna XXX can you land and hold short 31-13.
(brief pause.....)
Cessna: You bethca.

Tower: XXX is that a roger.

Cessna: ...Roger. Land and hold short 31-13.