题干
根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Health is the most important thing in the world．Nothing is more important than health．If one takes away our money, houses, cars, or even our clothes, we can still survive．____ That is why we always try to eat in a healthy way and exercise often.
How can we keep healthy? In order to eat healthily, I usually avoid eating food high in fat, like French fries or cookies, which are junk foods．____ Besides, I only eat a little meat.
____ Taking exercise every day helps us build a strong body．Regular exercise is an important part of keeping me healthy.
What's more, I think friends are important part of one's health．____ I always feel better when I am with friends than I am alone．When I am with my friends, I always laugh．Laughing is also an important part of health．It is good to stay with my friends.
By eating properly and exercising regularly, I can keep my body at a proper weight and keep healthy．By spending time with my friends, I can keep my mind as well as my body happy．These things sound easy to do, but not many people can manage them．____
A．Many studies show that people with a narrow range of social contacts often get sick. B．I think a strong will is necessary if we want to keep healthy. C．On the other hand, doing exercise is very important. D．There are some people who like staying alone, but they keep healthy. E．Some people appear fat because they often eat too much． F．But if our health is taken away, it is certain that we will surely die. G．I eat a lot of vegetables and fresh fruit which are full of vitamins. |
的自变量X的取值范围是（ ）