Humanoid Robots Race Humans in China Half-Marathon Running a half-marathon isn't easy, especially as you get closer to the finish when everything 1._____ (hurt) — your legs, lungs, chest and feet feel every one of those 21.1 kilometers. However fast or slow you run, you'll always feel something in your body — unless you're a robot, that is. That 2._____(put) to the test this April in China, when 21 humanoid robots took part in a half-marathon alongside human competitors. Organizers said it was a world first, with bipedal robots — robots with two legs — 3._____(compete) in the Yizhuang half-marathon in Beijing. The first robot 4._____(finish) took two hours and 40 minutes, which was more than twice as long as the male winner of the race, 5._____ finished in 62 minutes. The robots weren't left to fend completely for 6._____(them) — they were supported by teams of human 7._____(navigate), operators and engineers. As a precaution, a divider separated the parallel courses used by the robots and people. The rules for the robots were also slightly different: they were allowed to take breaks to swap batteries — something human runners would 8._____(sure) have loved to do too! The Sky Project Ultra robot from the Tien Kung Team claimed victory among the nonhumans. But some of the robots had a hard time. According to the BBC, one robot fell at the start line and lay on its front for a few minutes 9._____ eventually beginning its race. Another crashed into a railing not long into the race, causing its human helper to fall to the ground. Engineers said that 10._____ winning robot was helped by having long legs, while it was also programmed with an algorithm that was designed to help it run a long-distance race like a human. The human world record isn't under threat just yet, but engineers across the world continue to experiment! 答案与解析： 1. hurts 这里描述的是普遍现象或客观事实（接近终点时身体部位感到疼痛），应使用一般现在时。主语“everything”是第三人称单数，故填动词第三人称单数形式“hurts”。 2. was put 根据句意“这在今年四月于中国接受了检验”，主语“that”指代前文内容，与动词“put”构成被动关系（被检验），且事件发生在过去（this April），故用一般过去时的被动语态“was put”。固定搭配“put to the test”意为“使受检验”。 3. competing 此处是“with + 宾语 + 非谓语动词”复合结构。逻辑主语“bipedal robots”与动词“compete”是主动关系，且表示正在进行的动作，故用现在分词“competing”作宾语补足语。 4. to finish 此处是不定式作后置定语，修饰“the first robot”。序数词（如first, last, next等）常接不定式作定语，表示“第一个完成比赛的机器人”。 5. who 这里是非限制性定语从句，修饰先行词“the male winner”。先行词是人，且在从句中作主语，故用关系代词“who”引导。 6. themselves 固定搭配“fend for oneself”意为“照料自己”。主语“the robots”是复数，故用反身代词“themselves”与主语保持一致。 fend: /f nd/ v. 独立生活, 照料自己(to care for oneself without help from others) 7. navigators 根据句意，机器人需要人类团队的支持，这些成员包括“navigators”（导航员）、“operat ... ...
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