The Great Wall is ____________ wall in the world. There are many stories about it.

Have you been here before?— Yes. This is the third time that I ______ to Shanghai.

Tokyo will host2020 Sumner Olympics． —Really? It will befirst Asian city to host the Olympics twice．

I’ve lost my interest ____ physics. [ ]

He isn’t good at playing _____piano, but he plays _____Chinese chess well.