A)根据课文内容，选择答案，完成下表。

Para.	Main idea	A. Show us how stubborn his sister is by insisting on her idea about their plan. B. Tell us something about their great dream and how they started “the journey down the Mekong”to make their dream come true. C. Introduce to us some basic knowledge about the Mekong River from a large atlas.
1	_____
2	_____
3	_____

B)用文章中学过的单词或短语完成下面短文。
Mekong River begins _____ a glacier on a mountain in Qinghai Province. At first, the river is small and then the water begins to move _____. It becomes_____ as it passes _____ deep valleys, traveling _____ western Yunnan Province. Sometimes the river _____ wide valleys and becomes a _____. We were both surprised to learn that half of the river is in China. After it leaves China and high altitude, the Mekong becomes _____, brown and warm. As it enters Southeast Asia, its pace slows. It makes wide bends or meanders _____ low valleys to the _____ where rice grows. At last, the river delta enters the South China Sea.