What sentence best expresses the main idea of this passage? A)
The Sears Tower in Chicago, Illinois has long since
been surpassed as the tallest building in the world.
The Taipei 101 (located in Taipei, Taiwan) is the
second tallest building in the world after the Burj
Dubai.
B)
Once it is finished, the tallest building in the world
will be called the Burj Dubai and be over 160 stories
high.
The tallest buildings in the world, known as
D) superscrapers, are built by competition architects
from different nations.