请根据首字母填空，所填写单词一定不要包括首字母！！！大运河（Grand Canal）是世界上最长的人工河，北起北京，南至杭州。它是中国历史上最宏伟的工程之一。大运河始建于公元前4世纪，公元13世纪末建成。修建之初是为了运输粮食，后来也用于运输其他商品。大运河沿线区域逐渐发展成为中国的工商业中心。长久以来，大运河对中国的经济发展发挥了重要作用，有力地促进了南北地区之间的人员往来和文化交流。【2021.12英语四级翻译参考译文：大运河】The Grand Canal is the longest man-made riverin the world, stretching from Beijing in the north to Hangzhou in the south. It is one of the grandest 1p________in Chinese history. The Grand Canal was founded in the 4th century BC and was taken shape at theend of the 13th century. It was 2b______to transport grain at the beginning, andlater it was also used to transport other commodities. The area along the Grand Canal has gradually blossomed into the 3i________and 4c________center in China. The Grand Canal has been playing a critical 5r______in China’s economic rise for a long time, strongly promoting the personnel exchanges and 6c______7c________between the southern and northern regions.