65

　　1970s. It usually begins with the swimming.

　　66

　　(follow) by cycling, and finally running. A triathlon tests the endurance(忍耐力)and speed of an athlete, as well as his or her ability to keep energy and focus

　　67

　　the race as a whole. A triathlon competes against a clock, rather than against other athletes. A variation of the triathlon is a relay triathlon.

　　68

　　a different athlete completes each stage.

　　The swimming stage takes place in a lake or the open ocean. As soon as athletes come out from the water, they change into cycling at the

　　69

　　(fast) speed to save time. After cycling, the athletes change shoes to run. The course is considered complete once the athletes

　　70

　　(cross) the finish line.

　　【云南省临沧市第一中学2017届高三上学期第二次月考】语法填空（共10小题；每小题1. 5分，满分15分）阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

　　The dark chocolate is one of the favorite food choices by many people because it has a lot of benefits. When it comes to your health, here are the effects of dark chocolates

　　1

　　health.

　　First of all, it contains different kinds of antioxidants(抗氧化剂) which

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