He _______ his gun under the tree where he was __________.
The visiting professor giving lectures to students __________ invited to meetings at times.
They quarreled lastnight, but soon __________,talkingand laughing happily.
Putting in a new window will __________ cutting awaypart of the roof.
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.