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.Ain the 1920s, and Alexander Fleming learnedBand Alexander Fleming learned, in the 1920s,Cin the 1920s, when Alexander Fleming learnedDfrom Alexander Fleming, who learned in the 1920sEsince Alexander Fleming learned in the 1920s
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
参考解析
解析：
这句话是过渡性的错误，因为在原句中，两个从句看起来没有任何联系，应改为when。
这句话是过渡性的错误，因为在原句中，两个从句看起来没有任何联系，应改为when。
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