The university is saving $ 300,000 per year by its energy ______ efforts.
When you boil the milk you must _______ it carefully.
Eating too much fat can _______ heart diseases and cause high blood pressure.
We thought of selling this old furniture, but we have decided to _______ it.It might be valuable.
It was hard to describe the nightmare she had _______.
News reports say peace talks between the two countries _______ with no agreement reached.