Success in life doesn’t happen . It’s the result of devoting your time and energy to what you’ve set out to do.
A. in case
B. by chance
C. in return
D. by nature
网友回答
A. in case
(答案→)B. by chance
C. in return
D. by nature
解析：考查词组：A．in case以防万一，B．by chance偶然C．in return 做为回报，D．by nature天生的，句意是：生活中的成功不是偶然发生的，它是投入时间精力做决心做得事的结果。选B。