填空题

In the past hundred years a million people have died in earthquakes, another million have been killed by (36) and tornadoes and 9 million have lost their lives in floods. In addition to this many millions more have died as a result of famine and disease. We should also not forget in many of the world’s countries (37) , chronic water shortage, is a fact of life, especially in the African Sahel region (38) the Sahara desert.
Scientists and engineers around the world have made great advances in earthquake engineering. It is, of course, (39) physically to move cities such as Tokyo and San Francisco that have been built in earthquake (40) . But most often it is not the earthquake that (41) people, it is the (42) buildings, bridges and other structures that cause deaths, and the (43) of that happening can be greatly reduced by better building programs.
(44) . (45) we have catapulted (弹射) hundreds of species of plants and animals into extinction, at the same time possibly wrecking our own long-term prospects for survival. (46) .