Ⅲ. 根据中文意思完成句子。

1. 贝加尔湖是世界上最著名的湖泊之一。
Lake Baikal is lakes.
2. 要到达湖底，你必须潜水 1,620 米!
of the lake, you must dive 1,620 metres!
3. 毕竟，它是一处伟大的自然奇观!
, it is a great natural wonder!
4. 你可以在清澈的水中游泳或潜水，观赏珊瑚、植物以及彩色的鱼类。
You can swim or dive in the clear water and see coral, plants, and .
5. 如果你潜得更深，你甚至可能看到大型鱼类、海龟和鲨鱼。
, you might even see large fish, turtles, and sharks.
6. 亚马孙雨林拥有世界上种类最丰富的动植物。
The Amazon Rainforest is home to the largest variety of in the world.

Ⅲ. 1. one of the world's most famous 2. To reach the bottom 3. After all 4. colourful fish 5. If you dive deeper 6. plants and animals

Ⅰ. 根据课文内容，填入恰当的词汇使短文意思完整。
Reaching New Heights
To most people, Mount Qomolangma is one of the greatest wonders of the world. On the highest place on earth, you will feel like you 1. (能够触摸到天空). But only the best climbers reach the top, and that is only if they 2. (在恶劣的环境中幸存下来) first. On the mountain, temperatures can fall to -30 degrees. Climbers must also deal with thin air, high cliffs, and 3. (多变的天气).
Before 1960, no one was able to reach the top of Qomolangma from the northern side. Mountain climbers even called that way the “Death Road”, but a Chinese climbing team was 4. (决心要完成这次攀登).
On 24 May 1960, climbers Liu Lianman, Wang Fuzhou, Qu Yinhua, and Gongbu arrived at the Second Step. It was 8,600 metres above sea level. People said it was so high that 5. (甚至鸟儿也无法抵达那里). Liu allowed his teammates to 6. (踩在他的肩膀上). 7. (一点一点地), the climbers pulled themselves up, and they made it past the Second Step. At 4:20 a.m. on 25 May, the Chinese national flag flew above the world's highest mountain 8. (第一次).
In 1975, another Chinese team climbed to the top of Qomolangma to do research. This time, they brought a ladder to the Second Step. Until 2007, almost all climbers from the northern side used this “Chinese Ladder” to reach the top much faster. In 2020, a Chinese research team went to Qomolangma to 9. (测量它的高度)—8,848.86 metres.
Climbing Qomolangma is dangerous. Some climbers reach the top successfully, but many fail. Why do people still risk their lives to 10. (攀登最高的山峰) in the world? It is because 11. (人类的好奇心与雄心) cannot be stopped. Or, as the English explorer George Mallory put it, it is simply “because it's there”!

Ⅰ. 1. are able to touch the sky 2. survive the terrible conditions 3. changeable weather 4. determined to make the climb 5. even birds could not reach it 6. step on his shoulders 7. Bit by bit 8. for the first time 9. measure its height 10. climb the highest mountain 11. human curiosity and ambition