Rewrite the sentences using passive voice(пассивный стан) 1)They received a patent for the invention of this medicine fifteen years ago. 2)Who discovered the penicillin? 3)They are untrodusing new software now.
1) A patient for the invention of this medicine was received by them fifteen years ago. 2) Who was the penicillin descovered by? 3) New software are being intodusted now.