问题详情

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请帮忙给出正确答案和分析，谢谢！