帮帮忙改错You will never be able to completely master

题目

帮帮忙改错You will never be able to completely master
every detail of your life.Attempt to do so will only lead to disappointment.Besides,it's necessary of you to have clear goals.You'd better put your goals on paper where they are visible so that they can help to monitor your progress.

答案

(前后两句正确.)Besides,it's necessary of [改 for ] you to have clear goals.You'd better put your goals on paper where they are visible so that they can help [ 略去 "to"] monitor your progress....