Translation:In this country, you must not listen, must not see, must not believe.
there is a problem when it is the boxed words and the sentence goes more than one line. One cannot read the second line once the first line of boxes are there. Please make it so there's larger spaces or something...one has to write down the sentence in order to know what's behind the boxes!!!
I Googled this sentence and it appears that in the whole world ,only Duolingo has this meme
You CAN listen, but if they catch you, you will go to jail, so you MUST not listen.
"To can" is "thể".