Many countries are increasing their use of natural gas, wind and other forms of __________.
I was really anxious about you. You _______ home without a word.
This book _____ ten units, _______ three main revisions.
His uncle _____ until he was thirty-five.
After a long journey, they came to ______ was called Phenix City.
The students competed ___ each other ____ the honour of winning in school sports meet.