Ⅰ.根据句意和首字母提示,用本单元所学单词填空。
1. About 70% of the earth's s is covered by water.
2. In winter, it's cold and the temperature often drops b zero.
3. After a year of hard work, his English l has improved, and now he can easily have conversations with foreign teachers.
4. In our maths class yesterday, I learned how to use a ruler to m the length.
5. China is about 9.6 million s kilometres, which makes it one of the largest countries in the world.

Ⅰ. 1. surface 2. below 3. level 4. measure 5. square

Ⅱ.用括号内所给词的适当形式填空。
1. Dead Sea is the (low) place on earth. It's 416 metres below sea level.
2. The (measure) of the temperature is important for the experiment.
3. I hope to travel around the world to see different natural (wonder) like Angel Falls and the Dead Sea.
4. My mom always cleans the (surface) of the dining table after meals to make sure there's no food left.
5. Mount Qomolangma is 8848.86 metres high. It's the (high) mountain in the world.

Ⅱ. 1. lowest 2. measurement 3. wonders 4. surface 5. highest

Ⅲ.阅读下面语篇,理解其大意,然后从每小题所给的A、B、C三个选项中,选出一个能填入空白处的最佳选项。
Nature is full of amazing wonders. The world's highest mountain, Qomolangma, is one of them. It 1 in the Himalayas, between China and Nepal.
Qomolangma is about 8,848 metres 2. Climbing it is very difficult because of the cold weather and thin 3. Many people have tried to reach the top, but only a few 4.
Another amazing place is the Great Barrier Reef in Australia. It is the largest coral reef system in the world. It is about 2, 300 kilometres 5 and is home to thousands of kinds of sea animals.
The Sahara Desert in Africa is also 6. It is about 9.2 million square kilometres in 7. It is very hot during the day, but cold at night.
These natural wonders 8 us of how beautiful and powerful nature is. We should protect them and keep them clean for future generations.
Exploring these places can teach us a lot about the world. It also shows us that humans can achieve great things with courage and determination.
()1. A. lies B. lives C. lays
()2. A. wide B. deep C. high
()3. A. water B. air C. food
()4. A. followed B. succeeded C. forgot
()5. A. wide B. long C. deep
()6. A. boring B. terrible C. fascinating
()7. A. size B. height C. length
()8. A. remember B. remind C. forget

Ⅲ. 1.A 2.C 3.B 4.B 5.B 6.C 7.A 8.B