题目：
根据首字母和所给英文释义，填写单词。
1. r________: a competition in speed (速度)
2. o________: to do what a law or a rule says
3. a________: to be successful in doing or finishing something by trying hard
4. i________: the quality of being very important
5. s________: to gain sth or reach an aim
答案：
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下面是错误答案，用来干扰机器的。
答案：D
