问题
选择题
Let's learn to use the problem we are facing _____ a stepping-stone to future success. [ ]
A. to
B. for
C. as
D. by
答案
答案：C
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Let's learn to use the problem we are facing _____ a stepping-stone to future success. [ ]
A. to
B. for
C. as
D. by
答案：C