The text on a copy-prohibited web page can be pasted using the browser's 'Clipboard'. In most browser, press the "Control"+"V" shortcut key to copy the text on the current page and then press the shortcut key again to paste the copied content into the whiteboard so that you can paste it when needed. If you're using a mobile device, you can find the 'Clipboard' icon in the upper right corner of the screen and use it to copy text from a web page. In addition, if the text on the prohibited web page contains special characters or links, you can use the browser's "View" tab to select "Editor" or "Text Editor" and then use the "Paste" shortcut key on the keyboard to paste the text. It is important to note that if the text on the prohibited page contains sensitive information, please ensure that you comply with the relevant laws and regulations and do not illegally copy it.