选词填空模拟题

选词填空模拟题passage 1.

Perhaps like most American you have some extra pounds to shed. You may even have tried a fad时尚diet or two, but found yourself right back where you __47_. The key to weight loss is regular __48__activity. And surprisingly, you don’t have to give up eating or make the gym your second home to see long-term, __49__effects. Your body needs a certain amount of energy to maintain basic __50___ such as breathing, blood circulation and digestion. The energy required to keep your organs functioning is referred to as the resting or basal metabolic rate.

Any time you are active, __51__energy is requied. It is obtained from glycogen ( 糖原) and fat stored in the blood, liver, and muscles. The key to losing weight is to draw on the fat rather than on the carbohydrate reserves. Which of the two energy sources you use depends on the intensity and __52__ of your activity? The higher the intensity, the more your body will pull from the stored carbohydrates. The lower the intensity, the __53__ your body will rely on fat as its fuel.

Aerobic exercise is most __54__ for weight loss. When you perform aerobic activities your __55___ contract large muscle groups such as your legs and arms. Walking, running, rollerblading, swimming, dancing, and jumping jacks are all forms of aerobic activity. Surprisingly, if your aerobic activity is low to moderately intense and of long duration, you will burn more fat then if you had __56__ in a short burst of high-intensity exercise. In short, a brisk 30-minute walk will

2. Internet use appears to cause a decline in psychological well-being. Even people who spent just a few hours a week on the Internet experienced more depression and loneliness than those who logged on __47_ frequently. And it wasn’t that people who were already feeling bad spent __48__time on the Internet, but that using the Net __49__appeared to cause the bad feelings.

Reserachers are puzzling over the results, which were __50___contrary to their expectations. They __51__that the Net would prove socially healthier than television, since the Net allows users to choose their information and to communicate with others

The fact that Internet use __52__ time available for family and friends may account for the drop in well-being, researchers hypthesized. Faceless, bodiless “virtual” communication may be less psychologically __53__ than actual conversation, and the relationships formed through it may be shallower. Another possibility is that __54__ to the wider world via the Net makes users less satisfied with their lives.

“B ut it’s important to remember this is not about the __55___, perhaps; it’s about how it is used,” says psychologist Christine Riley of Intel, one of the study’s sponsors. “It really points to the need for considering social __56__in terms of how you desigh applications and services for