问题
选择题
Mistakes don’t just happen; they occur for a reason. Find out the reason, and then making the mistakes becomes ______.
A．favorable
B．precious
C．essential
D．worthwhile
答案
答案：D
四个选项分别表示良好的、珍贵的、本质的和值得做的，根据题意选D，找出原因，然后使错误变成值得做的。