Most Brazilians get along well with each other, _________ they are from different races(种族), including Americans, European settlers, and Africans,.
Our classroom _______ by us every day!
_______ I know, he is kind.
While she _______ , she cut herself.
The man ______ gave us a talk on science yesterday is a famous scientist.
_______ our surprise, he got the first place in the game!