سوال ۱۵ کنکور ارشد مهندسی مکانیک ۱۴۰۰

PART B: Cloze Test

Directions: Read the following passage and decide which choice (1), (2), (3), or (4) best fits each space. Then mark the correct choice on your answer sheet.

For some time now, medical scientists have noted an alarming increase in diseases of the heart and circulation among people who smoke cigarettes. (11) .......... in the bloodstream causes blood vessels to contract, thus (12) .......... circulation, which eventually leads to hardening of the arteries. (13) .......... the arteries stiffen, less blood reaches the brain, and the end result of this slowdown is a cerebral hemorrhage, commonly (14) .......... to as a “stroke”. In addition, (15) .......... reduces the ability of the hemoglobin to release oxygen, resulting in shortness of breath.

Blank (15).