阅读理解。 Yoga (瑜伽) is the most popular and fast growing exercise trend of all. Yoga has a greater positive effect on a person's mood and anxiety level than walking and other forms of exercise, because this exercise can create higher levels of the brain chemical GABA according to an article in The Journal of Alternative Medicine, published by Mary Ann Liebert, Inc. Yoga has been shown to increase the level of gamrna-aminobutyric (氨基 丁酸) acid, or GABA, a chemical in the brain that helps to regulate nerve activity. GABA activity is reduced in people with mood and anxiety disorders, and drugs that increase GABA activity are commonly used to improve mood and decrease anxiety. The authors suggest that the practice of Yoga stimulates specific brain areas, therefore giving rise to changes that help to improve mood. This is a spiritual exercise that will do wonders for your mood. Your whole body will get a total workout and a great stretch when you use Yoga every day. Yoga is healthy and fun. If you're ready to take your life in a totally new direction, which is well balanced and healthy, then Yoga is probably for you. Start slowly and do not push yourself too hard. Over the past few years, this form has really taken off and more and more people are choosing it among all other forms of exercise. It's like a natural fountain of youth. In no time people will ask if you have some work done, because you look so great! Give Yoga a shot and see what difference it can make your life. There are enough different types of Yoga out there for you to experience what is sure to find one that suits your fitness level and your pain tolerance. There are many ways for everyone to find just the right kind of Yoga for them. You'll find yourself much less stressed and more relaxed the more you do Yoga. Everyone deserves to feel good and strong, and that is exactly what Yoga will do for you. Yoga, if done correctly, can stretch the muscles but not hurt them. The best way to get involved in this exercise. The trick is to try a few different types. 1. According to the article in The Journal of Alternative Medicine, Yoga _____. A. change the structure of your brain and improve your intelligence B. stimulate your brain and improve your mood C. can take the place of medicine and benefit your health D. produce a chemical to regulate your behavior 2. What does 'shot' mean in this passage? A. View. B. Try. C. Change. D. Stop. 3. We can infer from the passage _____. A. Yoga can build your body as long as you practice it hard B. you should try every kind of Yoga since they all have their own functions C. if you do not do Yoga correctly, it will hurt your muscles D. you will never feel stressed if you stick to Yoga 4. What is the main idea of the passage? A. There are many types of Yoga for beginners. B. Several ways are advised to improve mood. C. Yoga is a great exercise for people to choose. D. Yoga can make you look great.