What Makes Me the Weight I Am?

　　There’s no easy answer to this question. Your genetic makeup, the physical traits that get passed down1 to you from your parents, plays a big part in determining your size and weight.

　　____1____ But if your parents are smaller than average, you may want to rethink that professiona1basketball career!2

　　The same goes for your body type.3 Have you ever heard someone say a person is “big boned4”? It’ s a way of saying a person has a large frame, or skeleton. Big bones usually weigh more than small bones. ____2 ___

　　Like your height or body type, your genes have a lot to say6 about what your weight wi11 be. But that's on1y part of the story. Being overweight can run in someone's farnily, but it may not be because of their genes.7—___3__ And even though some kids gain weight more easily than others, when they eat right and exercise , most kids can be a hea1thy and happy weight that's right for them. It' s true — the way you live can change the way you look.

　　How much you weigh is a ba1ance between calories you eat and the calories you use.

　　____4____ If you spend your free time watching TV, your body won’t use as many calories as it would if you played basketball, skated, or went for a walk. If you are in balance, your weight will stay right for you as you grow. But if you eat more and exercise less, you may become overweight. ____5 ____

　　练习：

　　A. That’s why it’s possible for two kids with the same height, but different weights, to both be the right weight.5

　　B. If you eat more calories than your body needs to use, you will gain too much weight.

　　C. Poor eating and exercise habits also run in families and this may be the reason the members of a family are overweight.

　　D. However, many overweight people have difficulty reaching their healthy body weight.

　　E. On the other hand, if you eat less and exercise more, you may lose weight8.

　　F. If both your parents are tall, there is a good chance you’ll be tall.

　　答案与题解:

　　1. F　文章开头表明,一个人的基因构成,即父母遗传给他的身体特征,很大程度上决定了他的身高和体重。接下来的句子应是对此论点的具体阐释:说明父母高矮与你的关系。

　　2.A　前两句表明,人的骨骼有大小之分,而大骨骼通常比小骨骼要重,因此才有可能出现这种现象,即身高相同、体重不同的两个孩子体重均正常。

　　3.C　前一句讲,身体超重有可能在家族中代代相传,但又不是基因遗传所致,接下来的句子就应说明其原因,即不良的饮食习惯与运动习惯也代代相传,而这正可能是家族成员普遍超重的原因。

　　4.B　前一句讲,一个人的体重体现的是所摄入热量与所消耗热量之间的平衡。由此可以推断,摄入的热量如果超过了身体的需要,就会超重。

　　5.E　前一句表明,如果一个人吃得多而运动得少,就有可能超重。“反之亦然”，即“吃得少而运动得多,体重就会减轻”，这显然应该是下一句所表达的意思。

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（实习编辑：高奕飞）