More people die of tuberculosis than of any otherdi sease caused by a single agent. This has probablybeen the case in quite a while. During the__ 1_early stages of the industrial revolution, perhaps one inevery seventh_ 2_ deaths in Europe’:s crowded cities were caused by thedisease. From_3
now on，though, western eyes， missing the global picture，saw the trouble_ 4 going into decline. With occasional breaks for war, the rates of death and infection in the Europe and America dropped steadily through the 19th and _5_20th centuries. In the 1950s， the introduction of antibiotics strengthened the . trend in rich countries, and the antibiotics were allowed to be imported to 6
poor countries. Medical researchers declared victory and wi thdrew.
They are wrong. In the mid1980s the frequency of infections and deaths_ 7_started to pick up again around the world. Where tuberculosis vanished， it came_ 8
back; in many places where it had never been away， it grew better. The World_ 9_Health Organization estimates that 1. 7 billion people (a third of the earth’s
population) suffer from tuberculosis. Even when the infection rate was falling, population growth kept the number of clinical cases more or less constantly at 8_ 10_
million a year. Around 3 million of those people died，nearly all of them in poor countries.
1将in改为for; for quite a while 作“相当长时间”讲.
在“keep sb/ sth adj”结构中的形容词作补语.