（7）处填入（）

A．rainforest
B．river
C．volcano
D．village

Life is a series of choices, and we cannot always foresee the consequences.

Harry Saleem, a very fat man with too much money and 1 , faced a choice now. Outside his office waited his personal doctor, bringing him 2 news about the only medicine that could save his life. On the other side of the world, one of his engineers 3 for his decision on an important matter of business.

The screen flashed to life, and Saleem"s engineer 4 up. The man talked by satellite directly to his 5 they were thousands of miles apart. His engineer was standing above a wide 6 in South America. A few months ago, Pakan Valley had been a 7 . Then Saleem"s men had 8 . They had cut down all the valuable trees and ordered the villagers to move out. 9 the bottom of the valley, a dam had been built. This would 10 hydro-electric power for the many factories that Saleem planned to build in the area to produce something. It was an operation which would bring him vast 11 . He never cared about 12 of the environment.

He 13 no reason to delay. He ordered the engineer to press the button. A mighty river changed its 14 , and water 15 into the doomed (注定要消失的) Pakan Valley.

Then a tall, thin doctor was led into Saleem"s office. "Congratulations! The new 16 is a great success! The only problem is to get more of it!" said the doctor. The doctor continued explaining that the main 17 of this new, life-saving medicine came from plant. "It"s a small, green orchid," he said. "There"s only one place in the world where they grow."

"Where" 18 the businessman, impatiently.

"Well," the doctor 19 , "Luckily the orchids come from some land which you 20 , sir, a place in South America known as Pakan Valley."