In my opinion, Li Jianrou is one of ___________ skaters this year.
It's twelve o'clock now. The Greens ______ lunch at home.
—______ do you go to the supermarket?—Because I want to buy some vegetables.
The elephants are ________ great danger in Africa.
I don't like singing and my brother doesn't like singing______.
Guangzhou is in the ________ of China.