Li Yundi began to learn the piano _____ the age of four and took part _____ the 14th Chopin International Piano Competition in 2000.[ ]

Beijing ______a lot in the past ten years. Now it has become one of the biggest modern______ in the world.

This is a boy .I don’t know name.

Here___ ___number of people. ___ number of them___fifty.

Ten years_______ since my uncle ________ to Ningbo.