--Where have you _______ all day?--- I came back at noon and I _______ in this office since then.
The bear looked ________the room, but there was no one in it.
_______ is celebrated on September 10th.
China is a great countrya long history?
All the students are looking forward _______ Nie Haisheng and Fei Junlong.
Nelson Mandela was of South Africa from 1994 to 1999.