About one dozen ancient bridges were still buried under the earth | 76_______. |
in | 77_______ |
The 13 bridges were built during the Yuan, Ming and Qing dynasty | 78_______. |
and they were buried under the earth main for two reasons. Firstly, | 79_______. |
some open rivers were changed into covering pipes and their bridges | 80_______. |
were buried, too. Secondly, some open rivers were filled. Neither were | 81_______ |
their bridges. Kong who has worked a specialist for 47 years wants | 82_______ |
to be record the underground bridges. He tries to make a list of them and | 83_______ |
add them to the history of bridges. Ancient bridges, both above or | 84_______ |
under the ground, are all paid attention to. We must be protected. | 85_______ |