One-third of the country____ covered with trees and the majority of the citizens______ black people.

 ---Have you heard that Tom, as well as his parents, ________ moved to Beijing ? ---Really ? No _________ I haven’t seen him for a long time.

Mary is the only one of the teachers who ________ a little Chinese because she is one of my friends who ________ been to China.

There______ some milk in the glass.

The number of tigers in Asia________ getting smaller and smaller and a large number of people_________ trying to protect them．