I have to admit that it     1     feels good to be back in the city again. And what a city—a city that was able to     2     itself after the earthquake in 1906. There are so many beautiful old buildings—many sitting on top of big hills,     3    great views of the city, the ocean, and the Golden Gate Bridge.

● As one of China's great former capitals, Xi' an     1         2         3     the largest city in the world during the Tang Dynasty,     4         5         6     of art and poetry. Chang' an, as it was known at the time, was the starting point of     7         8         9    , which connected China to the world.

● Florence     1         2         3     art, science and history museums and ancient buildings, as well as historic universities. You can visit many of these places to     4         5         6     the amazing work and discoveries that happened during the Renaissance period. An example is Michelangelo's famous statue David, which he completed between 1501 and 1504.     7         8     is the University of Florence. It was started in 1321 and many famous people studied there in the Renaissance period, including Leonardo da Vinci.