The company had about 20 notebook computers but only one-third _____ used regularly. Now we have 60 working all day long.
___ is believed ___ more and more people would fly to the moon in the future.
This ____ of trousers ____ fit me. Please show me ____.
She likes to use words ___ is clear to us.
He got home from work only to find the door ___ and something ____.
In our class everybody regards ___ difficulties as his own.