آزمون آنلاین زبان انگلیسی 2 - درس دوم | آزمون شماره 5810

In the social ......... of an underdeveloped society, the well-to-do stay on the top, and the more you move down, the more the number of the rich drops and the number of the poor increases.

According to the researches that have been recently conducted by scientists in the field of medicine, exercise can reduce the chance of heart disease. That's why I always tell my grandfather that ....................................... three times a week.

When the ................... cleaner started up , we couldn't hear each other because of its loud noise. 

He was overweight and he didn't do any exercise. The ................... of his death was heart attack. 

. I like the idea of that because it reminds me to think of the future rather than ...................... looking to the past