阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。
The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s w ater too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage (短缺) seems strange to someone fortunate enough to live in a high rainfall country, many of the world’s agricultural industries experience constant water shortages.
