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I am like a woodpecker. When I want to accomplish something, I just （）it.
A、​keep on
B、keep up
C、keep at
D、keep
【正确答案】：C
【题目解析】：此题考查与keep有关的短语，keep on sth.继续；keep up sth.保持，继续；keep at sth.坚持不懈地做某事。根据句意：我就像只逐木鸟，当我想要做某事时，我会一直坚持下去。可知，应选C。