【答案解析】1. It follows from the above considerations that scientists, whether they like it or not, are becoming involved in government, and hence in politics itself, to a far greater extent than ever before.
2. Thus it happened that when the new factories that were springing up required labor, tens of thousands of homeless and hungry agricultural workers, with their wives and children, were forced into the cities in search of work, and any work, under any condition, that would keep them alive.
3. As a result of two or three centuries of scientific investigation we have come to believe that Nature is understandable in the sense that when we ask her questions by way of appropriate observations and experiments, she will answer truly and reward us with discoveries that endure.
4. Once intimidated by arguments that their children would feel more at home in bilingual classes, and that they might lose their heritage in regular classes, these women have since given voice, loudly and persuasively, to what they know from experience that unless they are fluent in the language of their adopted country, their children will never attend college or land any but the most menial of jobs.
5. It is because of the close association in most people"s minds of tools with mall that special attention has always been focused upon any animal able to use an object as a tool, but it is important to realize that this ability, on it"s own, does not necessarily indicate any special intelligence in the creature concerned.