摘要：It was over a decade someone else turned penicillin into the great drug of the 20th century. A. since B. after C. that D. before
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It was over a decade _______ someone else turned penicillin into the great drug of the 20th century.
A. before B. that C. which D. after
查看习题详情和答案>>So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.
|
A．when |
B．that |
C．before |
D．unless |
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So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century
- A.when
- B.that
- C.before
- D.unless