5. The complexity of modern+ life calls for a variety of buildings.:现代生活的复杂性需要有多样的建筑。call for:要求；需要。Let's see to the problems that call for immediate solution.我们先处理迫切需要解决的问题。
6. More people live in mass housing：越来越多的人住在能住许多人的建筑里。mass:大量（人）的。如：mass media:大众传媒。weapons of mass destruction:大规模毁灭性武器。
7. Important characteristics of modern architectural works are...：现代建筑工程的重要特点是……works:（复数）作品；（建筑等的）工程。The villagers are busy building defensive works.村民们正忙着修防御工事。
练习：
1．Paragraph2____
2. Paragraph 3____
3. Paragraph 4____
4. Paragraph 5____
| A Building Materials
B Need of Greater Building Varieties in Modern Life C Restoration of Ancient Civilizations D Evolution in Style E Factors Affecting Modern Architecture F A Social Art |
5. Some buildings are so well constructed that they are not only useful_________.
6. Ancient Greek and Roman architectural styles， which were restored during renaissance， were still influential (缺状语).
7. As modern life becomes more complex， people have to put up many different kinds of buildings (缺状语).
8. The use of new building materials and the introduction of such new technology as the elevator and the air-conditioner have played an important role __________.
| A to meet their needs
B but also beautiful to took at C in the development of modern architecture D to design more buildings E even in the 20th century F to outlast their original use |
答案与题解：
1． C 本段谈到文艺复兴使古希腊和古罗马的建筑风格和原则重新兴起。
2． A 本段的内容主要是建筑材料。
3． B 第四段的大意是现代生活的复杂性需要有多种多样的建筑，此段的第一句话中 的calls for的意思同于needs.
4. E 本段讲了影响现代建筑学的诸多因素。
5. B 前面出现的not only是个提示，自然要找一下有没有but also了。
6. E 这句话重述了第二段的内容。
7. A 原句语法已经完整，再加入一个动词不定式短语to meet their needs说明目的。
8. C 看到play a role自然要看看后面有没有in短语，说明在哪方面发挥作用。