2. 外语
  3. During the past quarter century the power for man to alter the nature of his world has not only been increased to one of disturb

During the past quarter century the power for man to alter the nature of his world has not only been increased to one of disturb

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问题     During the past quarter century the power for man to alter the nature of
his world has not only been increased to one of disturbing magnitude but it 【M1】______
has changed in character. The most alarming of all man’s assaults upon the
environment is contamination of air, earth, rivers, and sea with dangerous 【M2】______
and even lethal materials. This pollution is for most part irrecoverable; the 【M3】______
chain of evil it initiates not only in the world that must support life but in
living tissues is reversible. In this now universal contamination of the envi- 【M4】______
ronment, chemicals is the sinister and little-recognized partner of radiation 【M5】______
in changing the very nature of the world and its life. Strontium 90, releasing 【M6】______
through nuclear explosions into the air, comes to earth in rain or drifts down
as fallout, lodges in soil, enters into the corn or wheat growing there, and in 【M7】______
time takes up its abode in the bones of a human being. Similarly, chemicals
sprayed on croplands or forests or gardens lying long in soil, entering into 【M8】______
living organisms, passing from one to the other in a chain of poisoning and 【M9】______
death. Or they pass mysteriously by underground streams until they emerge
and combine into new forms that kill vegetation, sicken cattle, and make un- 【M10】______
known harm on those who drink from once pure wells. As Albert Schweitzer
has said,""Man can hardly even recognize the devils of his own creation."
【M6】
选项
答案releasing — released
解析 release往往用作及物动词，这里应使用它的-ed分词形式表被动含义。请参见本书第35页对于-ed分词和-ing分词区别的详细叙述。
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