+0
Most people lead busy lives and don't have much time to cook. For such people, fast food can be one way to save time. Ordering a meal from a fast food restaurant is much quicker than cooking. We also don't need to go to a market or wash dishes. Moreover, it can also be cheaper. A set of a burger and fries is often cheaper than buying uncooked food from a market. All of this is attractive to millions of people.

Q) I was wondering why the underlined part is not said like "All of these are..." when "these" can refer to many things mentioned in the paragraph.
Q2) Does "this" refer to everything about good things about fast food mentioned in the paragraph just like "these" in my example?
+0
moon7296) I was wondering why the underlined part is not said like "All of these are..." when "these" can refer to many things mentioned in the paragraph.
All of this [situation] is...
moon7296Q2) Does "this" refer to everything about good things about fast food mentioned in the paragraph just like "these" in my example?
Yes.
Comments  
Try out our live chat room.
Ah ha.. then I can say that part either "All of this [situation] is...." or "All of these are....," right?
moon7296 then I can say that part either "All of this [situation] is...." or "All of these are....," right?
Well, 'situation' is not a particularly good word choice; I was using it as an explanatory devise only.
Ok. Then "All of these are...." can be used, right?
Students: We have free audio pronunciation exercises.
Right.