将下列五个选项填入正确的单词后面（只填选项，不写答案）
A、 a person who goes somewhere or does something before other people
B、known by many people
C、one thing that you study
D、continue, not stop
E、find the answer to a question
solve（ ），pioneer（ ）, be famous for（ ）, go on（ ）, in the field of（ ）
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