英语测试：Nature: Landscapes 自然：风景地貌（多项选择）BBC (ZT)
1. A very deep valley with steep sides is called a ________.
2. A lot of undiscovered animals live in the world's ________.
3. Watch out for the edge of the ________. It is very steep.
4. ________ are important to the world's water resources.
5. A ________ is another name for a large flat area of land, which is covered in grass with few trees and is usually found in hot countries.
6. A ________ is flat land that is usually found high above sea level.
答案见下：
英语测试：Nature: Landscapes 自然：风景地貌（多项选择）答案 BBC (ZT)
1. A very deep valley with steep sides is called a ________.
canyon
2. A lot of undiscovered animals live in the world's ________.
rainforests
Rainforests 的意思是热带雨林。
3. Watch out for the edge of the ________. It is very steep.
cliff
A cliff 的意思是悬崖，峭壁。
4. ________ are important to the world's water resources.
glaciers
Glaciers 的意思是冰川，冰河。
5. A ________ is another name for a large flat area of land, which is covered in grass with few trees and is usually found in hot countries.
savannah
Savannah的意思是热带大草原
6. A ________ is flat land that is usually found high above sea level.
plateau
plateau的意思是高原
