per training shoes then. F. She started by running to the shops, wearing a thick jacket, and carrying her shopping bag. 词汇锁定法:人称代词复现关联逻辑法:顺承关系;解释上文 32 . When es to marathon running, however, the experts are divided. One of them, Professor Craig Sharp says that if you are reasonably fit, you can probably run for two hours at a medium pace and feel OK. At this point your muscles run out of glycogen — the best source of energy we have. This means you start using fat for energy, and your body has to work harder to transform fat into energy. This happens at a time when you are starting to feel exhausted. And it can hurt your heart in the long run. C. Scientifically speaking, human beings are perfectly designed for jumping and running and walking long distances. 关联逻辑法:转折关系
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