7．
Throughout history，the Chinese nation has constructed (1) (thousand) of magnificent bridges， (2) ， of course．have become one of the marks of ancient Chinese civilization．
The Guangji Bridge， (3) (know) as the first opening bridge in the world，is one good example of them．It (4) (lie)in the eastern suburb of Chao zhou， China across the Hang River for over 800 years，which at first was (5) (simple)a boat bridge built in 1170 AD in Southern Song Dynasty with the (6) (long) of 518 meters．Later construction of piers and framework started from both banks of the river on which it was fixed，and it took a total of 200 years (7) (complete) the Guangji Bridge with a floating section of 18 supporting wooden boats in between the two beamed sections． When necessary the floating section can be unloked for the passage of big boats．which is really (8) imaginative invention in bridge-building history． There ale two iron cows standing at both ends of the bridge， (9) the hope of protecting the bridge from the flood damage． (10) makes the bridge particularly outstanding is that its two beamed sections resemble waterside streets with 24 different
styles' pavilions and towers for doing business，which become a special view on the bridge．
(1)