单选题 Not until 1942 ______ a drying patient's life using penicillin.
A. when John Bumstead and Orvan Hess saved
B. saved John Bumstead and Orvan Hess
C. did John Bumstead and Orvan Hess save
D. that John Bumstead and Orvan Hess

【正确答案】 C

【答案解析】[考点] 倒装句
[解析] not until在前，应用不完全倒装。