假如你是Linda，下面是你的笔友刘敏发给你的一封电子邮件。请你根据邮件内容及以下要求给刘敏回一封邮件。

Dear Linda,

    My friend, Mary, bought a new pen. I liked it so I used it without letting her know. Unluckily, I broke it. Then I put it back secretly (偷偷地). Now she knows the thing and she is very angry with me. I don't know what to do. Can you help me?

    Yours

    Liu Min

要求：1）指出刘敏的问题并给她提出建议；

2）80词左右，电子邮件的格式和结尾已给出，不计入总词数。

Dear Liu Min,

    ……

    I hope my advice can help you.

    Yours,

    Linda