have   building   each   look  first   they  in  enough  finish  but 

   have   building   each   look  first   they  in  enough  finish  but  much  at

Do you know the differences between the new building and the old ones?

Old buildings     1     brick(砖)and stone walls. The walls hold up the  2 .

In cities, many modern building     3    as if they are made just of windows. Walls of dark glass reach high into the air. Many buildings are    4   than 50 stories(层)tall.

Are walls of glass strong    5    to hold up the new buildings? No, The new glass walls do not hold up the buildings,    6    they only cover up the frame(框架)made of steel. Have you ever watched a new building going up? The steel frame is built    7  .Then the glass walls are hung on the frame. When the building is    8   ,the frame does not show. The outside looks like windows without walls. The glass walls shine   9   the sun with no decoration(装饰).Many people find    10    beautiful just as they are.

1._________  2._________  3._________  4._________  5._________ 

6._________  7._________  8._________  9._________ 10._________                       

1．Have   2.building  3.look   4.more   5.enough   6.but 7.first  8.finished  9.in  10.them