She decided to devote herself______the problem of old age.A、to studyB、studying

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问题 She decided to devote herself______the problem of old age.

选项 A、to study
B、studying
C、to studying
D、study

答案 C

解析本题考查动名词的用法。devote oneself to意思是“致力于，投身于”，此处to是介词，后面接动名词，因此选C。

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