In very busy organizations, filing is done at least every day. In a small or less busy office, filing can be done once or twice a week.　　Filing Equipment. Tools that people use in sorting out documents range from small instruments such as paper clips, office pins and staples to big machines such as photocopiers, printers and paper shredders.　　Kinds of Files. Documents taken out very often are usually kept in clip folders; otherwise they are often kept in lever arch files. Besides, suspension files and box files are also used for different purposes.　　What should be filed? People need to file documents that are sent to or received from by other people or organizations. These documents can be letters, reports, financial records, policy documents, etc.1. Filing should be done every day in each office.2. It is necessary to do filing no less than once every week in a small office.3. Only big instrument are in sorting out files.4. If you need always read the documents, you can put them into lever arch files.

阅读理解：阅读下面短文，根据文章内容进行判断，正确写“T”，错误写“F”。

　　How often should filing be done? It depends on how busy the office is. In very busy organizations, filing is done at least every day. In a small or less busy office, filing can be done once or twice a week.

　　Filing Equipment. Tools that people use in sorting out documents range from small instruments such as paper clips, office pins and staples to big machines such as photocopiers, printers and paper shredders.

　　Kinds of Files. Documents taken out very often are usually kept in clip folders; otherwise they are often kept in lever arch files. Besides, suspension files and box files are also used for different purposes.

　　What should be filed? People need to file documents that are sent to or received from by other people or organizations. These documents can be letters, reports, financial records, policy documents, etc.

1. Filing should be done every day in each office.

2. It is necessary to do filing no less than once every week in a small office.

3. Only big instrument are in sorting out files.

4. If you need always read the documents, you can put them into lever arch files.