請依下文回答第 21 題至第 25 題：
        You might think of yoga as just a way for people to twist their bodies into odd shapes, but there’smore to it than that. Yoga can improve your overall well-being by __21__  your mind, body and spiritsimultaneously. __22__ in ancient India, yoga is practiced today all over the world. On the most basiclevel, yoga is a form of exercise that combines stretching and strength training, __23__ can help youavoid injuries. Certain poses, like the cobra, work your whole body by strengthening your arm, leg, andcore muscles while lengthening your spine. Of course, when you first begin to do yoga, you might not beable to touch your toes, __24__ do difficult postures. With consistent practice, however, your body willbecome more flexible and the poses will get easier to do. Besides, when you pay attention to your breathwhile practicing, you also reach a more peaceful state of mind. This, __25__ , can improve your moodand memory. Even if you practice yoga just an hour a week, you’ll feel the difference it makes to yourbody and mind.
【題組】21
(A) assigning
(B) colliding
(C) engaging
(D) commanding