@Bhaktavatsalam Nallanthighal, Indeed, "this" refers to the speaker but the operate is different from "I". If I say "This is certainly mustafa", it reads as "the one who is talking on the cell phone is mustafa. So, this=the person who is talking within the telephone The Dukan diet plan needs https://cotaodeconvnios38158.blog-gold.com/48121405/considerations-to-know-about-telemedicina