Earth is the only place we know of in the universe that...

Câu hỏi: Choose the correct word or phrase that best fits each of the numbered blanks from 25 to 29:
Earth is the only place we know of in the universe that can support human life. 25______ human activities are making the planet less fit to live on. As the western world 26_____ on consuming two thirds of the world's resources while half of the world's population do so just to stay alive we are rapidly destroying the lonely resource we have by which all people can survive and prosper. Everywhere fertile soil is 27_______built on or washed into the sea. Renewable resources are exploited so much that they will never be able to recover 28______. We discharge pollutants into the atmosphere without any thought of the consequences. As a result the planet's ability to support people is being reduced at the very time when rising human numbers and consumption are 29_____ increasingly heavy demands on it.
The word or phrase which best fits the gap (27) is...
A. sooner
B. neither
C. rather
D. either