A number of students ______ playing on the ground but I don't know what the exact number______.

The famous singer and dancer____ our party this evening.

One third of the country _____ covered with trees and the majority of the citizens _____ black people.

— Would you mind if I sing here?—           . Look at the sign. It says “Be Quiet”.

 As a result of destroying the forests, large ____ of desert ____ covered the land.