Question

About one dozen ancient bridges were still buried under the earth	76_______.
in Beijing, according to Kong Qingpu, an expert in the bridge field.	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_______

Answer 1

76.were are                     77.正确                         78.dynasty dynasties

79.main mainly                80.covering covered           81.Neither So

82.在worked后面加as     83.去掉be                         84.or and          85.We They