一、1、the Leaning Tower of Pisa
2、not only...but also...
3、be famous/known for
4、be closed to
5、try to do...
6、at least
二、
三、1、London is one of the biggest cities in Europe.
2、Sichuan is famous for its hot food.
3、How many years did it take to build the bridge?
4、We had a wonderful time in the park last Sunday.
5、His new computer is quite clifferent from the old one.