PENICILLIN IS PERHAPS THE DRUG ________ MORE LIVES THAN ANY OTHER...

49. - LUYEN THI TOIEC 870 CAU TRAC NGHIEM
LUYEN THI TOIEC 870 CAU TRAC NGHIEM
49. Penicillin is perhaps the drug ________ more lives than any other in the history of medicine.(A) what has saved(B) which saved(C) which has saved(D) who saves