Will not allow me to view the Reading for the Activities for Unit ?
Are you referring, perhaps, to the second reading, Hutton Webster’s World History? That is a pretty large file (~70 mb) and will take a while to download on most networks.
I would actually recommend, if possible, using this HTML reader at the Internet Archive: https://archive.org/stream/ost-history-world_history/World_History#page/n433/mode/2up/search/320
Click on the right or left to turn the pages, or use the slider at the bottom to browse quickly through the book.
If it’s another link you mean, just let me know and I’ll see what I can do!