-How long has the United Nations __________?-__________1945.
All classes of his school are __________ with modern teaching __________.
The company had about 20 notebook computers but only one-third __________ usedregularly. Now we have 60 working all day long.
The __________ of thestudents in that class __________ boys.
I never expected you to __________ at the meeting. Ithought you were abroad.
All the __________expressed their opinions on the __________ of the world.