Ⅳ. 阅读下文，选择正确答案。

1. Which one is in the north of China? （）
A. The Qinghai-Tibet Plateau.
B. The Loess Plateau.
C. The Yunnan-Guizhou Plateau.
D. The Inner Mongolian Plateau.
2. Which one is the highest plateau in the world? （）
A. The Qinghai-Tibet Plateau.
B. The Loess Plateau.
C. The Yunnan-Guizhou Plateau.
D. The Inner Mongolian Plateau.
3. Where is the Loess Plateau? （）
A. On the east of Taihang Mountains.
B. On the south of Qilian Mountains.
C. Between Taihang Mountains and Qinling Mountains.
D. Between Taihang Mountains and Qilian Mountains.
4. Where is the passage most probably from? （）
A. A storybook.
B. A health magazine.
C. A research report.
D. A geography textbook.

1.D 2.A 3.D 4.D