OPEN AND ABOVEBOARD

open and aboveboard

[also honest and aboveboard] Candid and fair, without deceit or trickery, as in

I'll join you, but only if everything remains open and aboveboard.

Both versions of this expression are redundancies, since they use 'open' and 'aboveboard' in the sense of “honest.” The latter word, dating from the early 1600s, comes from gambling and alludes to the fact that card players who do not keep their hands on the table (board) may be suspected of changing their cards under the table.

http://www.dictionary.com/browse/open-and-aboveboard

Listening activity we did on 5th May:  

    questions    audio     answer key    transcript 

Listening activity to do as homework: 

    questions    audio     answer key     transcript

(Both activities are part of the Listening test from the 2013 C1 Prueba de Certificación used in Extremadura)