They’re arguing on who, on earth, is known for the great discovery        penicillin, an effective bacteria killer.

They’re arguing on who, on earth, is known for the great discovery        penicillin, an effective bacteria killer.

They’re arguing on who, on earth, is known for the great discovery        penicillin, an effective bacteria killer.

1. A.
   making up
2. B.
   making into
3. C.
   made of
4. D.
   made from

27. They’re arguing on who, on earth, is known for the great discovery ______ penicillin, an 　 effective bacteria killer.

　 A. making up                       B. making into            C. made of                D. made from

27. They’re arguing on who, on earth, is known for the great discovery ______ penicillin, an 　 effective bacteria killer.