{{i}}quEstions 14-17 ArE BAsED on thE Following monologuE. you now hAvE 20 sEConDs to rEAD quEstions 14-17.{{/i}}

whEn wAs thE pEniCillin mAss-proDuCEDA．in 1928.
B．in 1913.
C．AFtEr worlD wAr ii.
D．By worlD wAr ii.