Listen to the recording
A. In the early 1800s.
B. In the late 1800s.
C. In the early 1900s.
D. In the late 1900s.
Questions 17 to 19 are based on the passages you have just heard.
A. It is 5,500 meters above sea level.
B. Its rich colors come from mineral layers.
C. It is discovered many years ago.
D. About 2,000 people climb it every day.
Listen to the recording
A. By raising horses.
By planting trees.
C. By selling wool.
D. By mining coal.
Listen to the recording
A. Emerging infectious diseases.
B. Alcoholism and malnutrition.
Corruption and inequality.
D. Poor economic development.