The history of civil engineering( 土木工程 ) is 1._______ very important story in the development of civilisation ( 文明 ). Civil engineers 2._______(begin) practising their profession 400 years ago. What is left of their work is the proof that they were wise. These engineers of the ancient world built entire cities. They 3._______(design) systems of pipes 4._______ supplied fresh water. They built water pipelines for farmlands as well as bridges of great 5._______(long). The relics of their buildings tell us much about the work of early engineers. Consider the pyramids of Egypt. 6._______ are evidence that some of the earliest engineers had great scientific ability. There is also evidence that those engineers could make lasting work of art and design. The Egyptian engineers lived thousands of years ago, 7._______ they used very exact measurements. They also set up methods of moving and 8._______(shape) the building materials. These materials were very heavy. They had to 9._______(bring) from miles away and sometimes lifted several hundred feet. During the work the engineers commanded thousands of 10._______(work).