2021考研英语一完形填空试题及答案解析

Section I Use of English

Directions:

Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET. (10 points)

Fluid intelligence is the type of intelligence that has to do with short-term memory and the ability to think quickly, logically, and abstractly in order to solve new problems. It1 in young adulthood, levels out for a period of time, and then2 starts to slowly decline as we age. But3 aging is inevitable, scientists are finding out that certain changes in brain function may not be.

One study found that muscle loss and the4 of body fat around the abdomen are associated with a decline in fluid intelligence. This suggests the5 that lifestyle factors might help prevent or6 this type of decline.

The researchers looked at data that7 measurements of lean muscle and abdominal fat from more than 4,000 middle-to-older-aged men and women and8 that data to reported changes in fluid intelligence over a six-year period. They found that middle-aged people9 higher measures of abdominal fat10 worse on measures of fluid intelligence as the years11.

For women, the association may be12 to changes in immunity that resulted from excess abdominal fat; in men, the immune system did not appear to be13 . It is hoped that future studies could 14 these differences and perhaps lead to different15 for men and women.

16 , there are steps you can17 to help reduce abdominal fat and maintain lean muscle mass as you age in order to protect both your physical and mental18 . The two highly recommended lifestyle approaches are maintaining or increasing your19 of aerobic exercise and following Mediterranean-style20 that is high in fiber and eliminates highly processed foods.