I recently came across some english test prep questions for 수능, which is a korean equivalent of SAT. They were mostly reading questions but then I found out that the writing is really poor( or at least I thought so..). What do you think of it? I'll copy it below. 

28) Water has no calories, but it takes up a space in your stomach, which creates a feeling of fullness. Recently, a study found that people who drank two glasses of water before meal got full sooner, ate few calories, and lost more weight. You can put the same strategy to work by choosing foods that have a higher water content over those with less water. For example, the only difference between grapes and raisins is that grapes have about 6 times as much water in them. That water makes a big difference in how much they fill you up. You'll feel much more satisfied after eating 100 calories' worth of grapes than you would after eating 100 calories' worth of raisins. Salad vegetables like lettuce, cucumbers, and tomatoes also have a very high water content, as do broth-based soups.

40) People tell about their own experiences all the time, but they do not necessarily tell about the same experience in the same way every time. The telling process, even in the relating of a firsthand experience, can be a highly inventive process. That is, the art of storytelling involves finding good ways to express one's experiences in a way appropriate to the listener. A fine line exists, therefore, between invented stories and the relation of firsthand experiences. The entertainment factor exists in relating firsthand experiences just as it does in inventing stories. Nobody wants to listen to what happened to you today unless you can make what happened appear interesting. The process of livening up an experience can involve simply telling that experience in such a way as to eliminate the dullest parts, or it also can involve 'improving' the dull parts by playing with the facts.

And these are just two examples. I guess they are grammatically correct, but they look unnatural. Am I prejudiced? I'm really confused, so tell me if you think these two examples are natural. 

It'd be fun if you explain what your country's english test questions look like(if you have any).

+Any spelling mistakes in the texts would be mine!