B. Making your body healthier.

C. Making you feel more energetic.

D. Making your muscles work more effectively.

【答案】1. B 2. A

【解析】本文提供了如何提高身体机能的建议，找出你需要什么种类和多少体能锻炼。

1. 主旨大意题。根据文章的标题Finding out what kind and how much physical activity you need找出你需要什么种类和多少体能锻炼。得知本文写作目的是提供健身的建议。故选B。

　　Herbal medicine (草药), which has been used for medicinal purposes, is the use of plants to treat diseases. Many herbalists use the entire plant, from the flowers, stems, leaves, and roots, in the form of everything from teas to pills. These plants contain natural, chemical things that can treat the body for a variety of diseases- such as allergies, asthma, rheumatoid arthritis, migraine, chronic fatigue, and cancer, among others.

　　Nowadays an increasing number of people prefer to adopt these plants to treat their diseases because, compared with chemical medicine, herbal medicine has its own advantages. Herbal medicine and remedies (治疗) are more effective than chemical medicine for certain diseases. The chemical medicine given by a chemist could have certain negative side effects. However, many of the herbal medicine and remedies do not have negative side effects. If any, they are softer than chemical medicine. Obesity is the cause of many of the health problems. Herbal medicine can help weight-loss more effectively and improve overall health.

However, the cure using herbal medicine and supplements (营养品) would take some time, and therefore people are supposed to possess enough patience. Worse still, herbal medicine contains a variety of ingredients (成分) and people have to be sure that their body agrees with the ingredients and that it is not allergic (过敏).