问题
选择题
Although he has failed many times, he keeps _____ hard to make his dream come true.
A. working
B. to work
C. worked
答案
答案：A
题目分析：句意：虽然，他已经失败了许多次，但是，他仍坚持努力工作，为了实现他的梦想。分析：考查固定短语keep doing sth.坚持做某事。故选 A
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