Early in the twentieth century, Lake Konfa became very polluted.Recently fish populations have recovered as release of industrial pollutants has declined and the lake’s waters have become cleaner.Fears are now being voiced that the planned construction of an oil pipeline across the lake’s bottom might revive pollution and cause the fish population to decline again.However, a technology for preventing leaks is being installed.Therefore, provided this technology is effective, those fears are groundless.
The argument depends on assuming which of the following?
A. Apart from development related to the pipeline, there will be no new industrial development around the lake that will create renewed pollution in its waters.
B. There is no reason to believe that the leak-preventing technology would be ineffective when installed in the pipeline in Lake Konfa.
C. The bottom of the lake does not contain toxic remnants of earlier pollution that will be stirred into the water by pipeline construction.[z1]
D. Damage to the lake’s fish populations would be the only harm that a leak of oil from the pipeline would cause.
E. The species of fish that are present in Lake Konfa now are the same as those that were in the lake before it was affected by pollution.
[z1]只要技术有效，人们的担忧是无意义的。排除人们的担忧是有意义的可能性：人们的担忧是：油管的建设重新激起污染并且导致又一次的鱼的数量下降。作者: 瓦利哥 时间: 2012-9-8 17:32
Conclusion is that those fears are groundless. You must ask yourself what are these fears. These fears in the argument are about the construction of an oil pipeline which might revive pollution and cause the fish population to decline. Answer A has nothing to do with the construction of an oil pipeline.作者: DeliciaAn 时间: 2015-3-23 23:15
结论是those fears are groundless.问的是assumption的题目。就是说问的是hidden presume,也就是说要找一个和原文的presume什么的加起来后可以帮助得出原文中的结论。原文的结论：在技术能够有效的前提下，这些担心是是无理由的、无根据的。这里的担心就是industrial pollutants.