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.

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