Hello,
Please import the following xml file from Tools >> Import >> WordPress Importer >> Select file and Import.
Screenshot for Clarification: https://www.screencast.com/t/sXyPLWWBQG5
If the WordPress importer is not installed then you need to install it to use.
Download file from the following link: https://gofile.io/?c=a91vA5
It will import all the HTML Block Dummy Content modules in your website then you can choose the one you want to use accordingly.
If you are unable to import the file then tell me i will check it myself and import it for you.
Best Regards.