问题补充：
the secret of nature, the young scientist has little time for entertainment.
A. Devoted to bring out
B. Devoted himself to bringing out
C. Devoted to bringing out
D. Devoting to bring out
答案：
A. Devoted to bring out
B. Devoted himself to bringing out
(答案→)C. Devoted to bringing out
D. Devoting to bring out
解析：考查分词做状语和词组：句意：致力于揭示自然的秘密，年轻的科学家没有时间娱乐。“致力于”可以是be devoted to doing，或devote oneself to doing，所以要么用Devoted to bringing out要么用Devoting himself to bringing out，选C。
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