achieve attain的区别?

题目

achieve attain的区别?
如After working for the firm for ten years,he finally _______ the rank of deputy director.
A.achieved B.approached C.attained D.acquired
为什么选attained,而不选achieved

答案

achieve 是取得（成绩）,达到（目的）,取得（胜利）比如 They achieved some victories despite these setbacks.尽管受到这些挫折,他们还是取得了一些胜利.attain 多指到达、至,达到（目标）,获得（成就、权利）等....