Ⅰ.根据句意和首字母提示,用本单元所学单词填空。
1. The Yellow River helped ancient Chinese c by providing water for farming and life.
2. The Sahara is the biggest d in the world. It's about 9,000,000 square kilometres in size.
3. A bus is an important m of transportation(交通). Many people take a bus to work.
4. The Hukou W is on the Yellow River, between Shanxi and Shaanxi provinces.
5. We learned about the d of our city in history class. It changed a lot.

Ⅰ. 1. civilizations 2. desert 3. means 4. Waterfall 5. development

Ⅱ.用括号内所给词的适当形式填空。
waterfall civilization long develop far
1. The Yangtze River travels in China and is about 6,300 kilometres long.
2. I want to visit the Huangguoshu in Guizhou. It's really amazing.
3. This small town gets bigger and we want it into a modern city.
4. China is one of the oldest in the world. We are all proud of it.
5. —Do you know the Yellow River?
—Yes, it is the second river in China. We call it our "mother river".

Ⅱ. 1. farthest 2. Waterfall 3. to develop 4. civilizations 5. longest

Ⅲ.根据汉语意思完成句子,每空一词。
1. 长江流得最远,大约6300千米长。
The Yangtze River travels and is about 6,300 .
2. 尼罗河是世界最长的河流。
The Nile is in the world.
3. 我们称黄河是我们的"母亲河"。
We the Yellow River our " ".
4. 尼罗河和黄河帮助了古代文明的发展。
The Nile and the Yellow River helped in the of .
5. 尼罗河在埃及历史上很重要。
The Nile is in .

Ⅲ. 1. the farthest, kilometres long 2. the longest river 3. call, mother river
4. development, ancient civilizations 5. very important, Egypt's history