情景作文。

     假如你是高三学生李华，你的笔友Tim给你发了一封电子邮件，向你了解高考后这个暑假的打算。

你给他回复，告诉他你将去上海参加世博会志愿者服务工作。请参照表格中的提示，给Tim写一封邮

件。

     注意：1. 邮件的开头和结尾已为你写好。

                2. 词数不少于60。 

Dear Tim,

     I've received your email, asking me about my plan for the summer vacation. Now let me tell you something

exciting.

     ______________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

     I hope you can come and see it for yourself.

                                                                                                                                        Fondly Yours,

                                                                                                                                        Li Hua

为了确保一体化管理体系的持续有效性、适用性和充分性，实现对一体化管理体系的全面改进，需要定期进行( )。

A．外部审核
B．内部审核
C．系统审核
D．管理评审