We all think we are tired after the long work. Let，s stop      a rest.

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

 Every possible means ______ to prevent the air pollution, but the sky is still not clear. 

Standing inside ____ lots of strange creatures with white skin and large black eyes.

Either you or one of your students _______to attend the meeting that will be held tomorrow.