【www.shhhjz.cn--雅思】
1. Libraries made education possible, and education in its turn added to libraries; the growth of knowledge followed a kind of compound-interest law, which was greatly enhanced by the invention of printing.
要点：从内容上分析，which修饰 the growth of knowledge
图书馆的出现使教育的发展成为可能，而教育的发展又反过来使图书馆不断扩大充实。知识的增长遵循了一种复利法则。由于印刷术的发明，这一知识增长过程得以大大加速。
2. If they can each be trusted to take such responsibilities, and to exercise such initiative as falls within their sphere, then administrative overhead will be low.
如果他们每个人都能予以信任承担这样的职责，并在他们所管辖的范围内发挥主动性，那么管理费用就会降低。
3. There are probably no question we can think up that cant be answered, sooner or later, including even that matter of consciousness.
迟早可能不存在我们想得出但解答不了的问题，甚至包括我们意识的问题。
4. The curtain was rung down in that phase of history, at least, by the sudden invention of the hydrogen bomb, of the ballistic missile and of rockets that can be aimed to hit the moon.
至少由于氢弹、弹道导弹和登月火箭出人意料地发明，那个历史时期宣告结束了。
