Задание №20501 ЕГЭ по Английскому языку

What                          (CAUSE) ice cream headaches? While many theories on what exactly causes ice cream headaches or “brain freezes”                          (EXIST) for some time, it has only been very recently that it                          (DISCOVER) exactly what is going on here. It turns out, ice cream headaches are a result of a rapid change in the size of blood vessels as a response to an extreme shift in temperature in the roof of the mouth, particularly the back of the roof of the mouth.

Specifically, what                          (HAPPEN) here is that when you stick something extremely cold in your mouth and eat it quickly, such as drinking an ice cold beverage or eating ice cream fast, it rapidly                          (COOL) the palate of your mouth. The reason why this is significant is that there is a nerve center located just above the back of the roof of your mouth.

Shortly after, the temperature at the palate of your mouth goes back to normal and the nerve centers signal that everything is fine and the blood vessels end up rapidly dilating. This all can happen in a matter of a few seconds, but it is an extreme, sharp pain, often in your temples, forehead, or sometimes even in your face                          (IT).