单选题An experimental accident in London led to the discovery of penicillin in the 1920s, and Alexander Fleming learned of the mold’s curative properties.A in the 1920s, and Alexander Fleming& learnedB and Alexander Fleming learned, in the& 1920s,C in the 19
题目
单选题
An experimental accident in London led to the discovery of penicillin in the 1920s, and Alexander Fleming learned of the mold’s curative properties.
A
in the 1920s, and Alexander Fleming& learned
B
and Alexander Fleming learned, in the& 1920s,
C
in the 1920s, when Alexander Fleming& learned
D
from Alexander Fleming, who learned in& the 1920s
E
since Alexander Fleming learned in the& 1920s