Réponse :
1/ the vaccine was dicovered by Paster in 1885
2/ Our environment must be protected by everybody
3/ This satellite will be launched next year
4/New products are being tested at the moment
5/Many hearts have been transplanted since 1970.
Explications : il te suffit de conjuguer BE au temps de la phrase à la voix active et après le Be, le verbe est au participe passé.
