问题补充:
The young doctor is determined to devote all his life to the cause of cancer.
A. studying
B. studied
C. study
D. studies
答案:
(答案→)A. studying
B. studied
C. study
D. studies
解析:考查固定词组:devote all one’s life to doing,一生致力于做…,句意:年轻一生决定一生致力于研究癌症事业。选A。