单项选择题

Mistakes don"t just happen; they occur for a reason. Find out the reason and then making the mistake becomes ______.

A．favourable
B．precious
C．essential
D．worthwhile
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单项选择题
In this lecture, I can only give you a purely ______ view of how we can live life to the full and make some suggestions about the future.
A．private
B．personal
C．unique
D．different
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