写报告的信通常需要包含以下几个部分：

称呼

如果是对公司内部人员写信，可以使用“Dear Secretary and Departmental Assistances”或“Dear Mr./Ms. [Last Name]”等正式称呼。

开头

简短地介绍自己，并说明写信的目的，例如：“I am writing to request a brief report on your activities during the company year.”

报告内容

职责描述：详细说明你的主要职责以及每项职责所花费的时间比例。

指令来源：列出给你提供工作指示或口头指令的教师或管理人员的姓名。

建议：提出任何关于工作或工作环境的建议，以改善工作条件。

结尾

表达感谢，并说明希望收到报告的日期，例如：“Thank you for your time and attention. I look forward to receiving your report by April 12.”

落款

签名，例如：“Sincerely,”或“Best regards,”

```

Dear Secretary and Departmental Assistances,

I am writing to request a brief report on your activities during the company year. Please include the following information:

1. The particular duties which you perform, with an estimate of the proportion of your time devoted to each type of duty.

2. The names of faculty and executive force by whom you are given instructions for work or dictation.

3. Any recommendations that you wish to make in regard to your work or your surroundings—anything which, in your opinion, would improve the conditions under which you are working.

I should like to have this report not later than April 12. Thank you for your time and attention.

Sincerely,

[Your Name]

```

请根据具体情况调整信件的内容和格式，确保信息准确无误，并且语言正式且礼貌。