A. 根据语境填写单词。
1. The calm sea's shines in the bright sunlight every morning.
2. Brave scientists into the deep ocean to explore its hidden secrets.
3. A special high-tech can sail safely to the far and deep Mariana Trench.
4. The vast has unique plants and animals that can live in dry conditions.
5. We can find many rare(罕见的) sea creatures at the of the deep blue sea.

1. surface 2. dive 3. vessel 4. desert 5. bottom

B. 查找资料，用最高级形式和大数字完成下面的世界之最。
1. Mount Qomolangma is the mountain in the world, with a height of about metres.
2. The Lake Baikal is the freshwater on earth, about metres deep.
3. The Nile River is the river in the world, about kilometres long.
4. The Sahara Desert is the desert in the world, with an area of about square kilometres.
5. The Mariana Trench is the trench in the world, about metres deep.

1. highest; 8848.86
2. deepest; 1,620
3. longest; 6,671
4. largest; 9,000,000
5. deepest; 11,000