1. (2022高三上·竞赛)  Please read the following passage and fill in the blanks with the correct forms of 5 words or phrases out of the 8 given in the box, according to the context.请阅读下面的篇章，并根据其内容提示，从方框中所给的8个词语中选出5个，并用其正确形式填空。

chance, come up with, athlete, go up, steady, run through, that, send up

The Great Wall Marathon

The Great Wall of China is one of the new wonders of the world, with breathtaking views. In 1998 Soren Rasmussen  the idea of organizing a Great Wall marathon. Rasmussen and two running experts chose a route along part of the Great Wall. The marathon has taken place annually in May since 1999. In the initial event, just 292 runners participated but numbers have gone up —in 2015 there were 2,500 runners from over 160 countries.

The Great Wall marathon is considered to be one of the toughest in the world. The part of the route that is actually on the Great Wall includes two exhausting up-and-down sections about 8 km long with 5,146 steps. It's such a steep climb in parts it's hard to walk up—never mind run! The weather is hot and humid, with temperatures of around 30℃, but it can be hotter. Part of the route passes through a dry river bed with huge boulders(巨石). Runners who arrive there later in the day find it challenging because the boulders have become so hot that it's like a sauna.

So who does the marathon? Surprisingly, the marathon attracts both professional  and people who want to run for fun or simply do something different. Some runners stop every 10-15 minutes to take photos, chat to the locals and enjoy the scenery! If the thought of doing such a marathon horrifies you, then you can do a half marathon or an 8-km fun run instead.