文章大意：本文是一篇说明文。世界卫生组织的一项新的研究发现， 全世界大约有25%的成年人缺乏足够的锻炼；女性由于要照顾孩子和做家务，与男性相比锻炼得更少。此外，高收入国家的人比低收入国家的人锻炼得少。
7 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
According to 1 new study by the WHO(World Health Organization), about 25 percent of adults worldwide do not get enough exercise. Because of this, about 1.4 billion people are 2 greater risk of developing 3 (dead) diseases such as heart disease and cancer.
When it comes to 4 (exercise) more, experts say that people needn't go to the gym every day. There are other ways to exercise. For example, we can take the stairs instead of taking an elevator. And standing on one leg for 30 seconds each day 5 (be) also good for our health.
The study also finds that women are less active than men because 6 (them) tend to spend more time at home taking care of 7 (child) and doing housework.
Countries with higher incomes show higher rates of inactivity. For example, people in Kuwait and the United States exercise less 8 people in Uganda and Nepal. This is partly because in 9 (develop)areas, desk jobs have taken the place of physical labor and cars 10 (replace) walking.
