Question 22 is based on the passage you have just heard.

Passage Three

听力原文

    After a tough workout or a day full of physical activity, it’s common to find your muscles aching, but where do these pains come from? (22) According to a German professor, the soreness comes from straining your muscles in an uncommon way. For example, jumping on a bicycle for a ride because you haven’t ridden in a long time. Soreness occurs since your leg muscles aren’t used to that movement. When muscles perform an activity, they aren’t regularly expose to, the tiny fibers that are inside them are being torn apart. As muscle soreness develops, the body has to work to repair the muscle tears, but this doesn’t happen immediately. (23) First, the body must realize the muscles are damaged. When the body realizes the muscles are hurt, the response is to increase blood flow to the area and increase body heat, damaged cells are then cleaned up and the body sends cells specially designed to break down the large muscle fiber fragments. Healing can take place after this. It takes about a day until these cells make it to your aching muscles. That’s why there is most often a delay associated with muscle soreness. (24) Repair of damaged cells takes about two days, and afterwards the soreness disappears. (25) Unfortunately, there is little that can be done to relieve muscle soreness. Pain relieving creams don’t work, but a hot shower, or warm bath can provide some relief.

22. What does the German professor say about muscle soreness?   

解析：D。录音前面提到，根据一位德国教授的说法，这种疼痛来自于肌肉拉伤，这种拉伤是一种不寻常的运动方式造成的，D项中的straining one’s muscles in an unusual way是录音中straining your muscles in an uncommon way的同义替换，故正确答案为D。A项的repetitive activity在录音中并未提及，故排除。B项内容在录音中并未提及，故排除。C项利用uncommon设置干扰，但录音说的是这种疼痛是由于运动方式与以往不同（uncommon way）造成的，并非是因为人们从事不寻常的活动（uncommon activity），故C项错误。