问题
选择题
29. ______ in the sports world, a sportsman needs to train constantly to keep himself in best condition.
A．Survive
B．Surviving
C．To survive
D．Survived
答案
答案：C
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29. ______ in the sports world, a sportsman needs to train constantly to keep himself in best condition.
A．Survive
B．Surviving
C．To survive
D．Survived
答案：C