问题
选择题
Many people can't learn any lessons from the mistakes they've made _____ they get hurt somehow.[ ]
A. whether
B. unless
C. if
D. as
答案
答案：B
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Many people can't learn any lessons from the mistakes they've made _____ they get hurt somehow.[ ]
A. whether
B. unless
C. if
D. as
答案：B