It was at the very beginning _______ Mr. Fox made the decision _____ we should send more fire-fighters there.
This washing machine is environmentally _______ because it uses less water and electricity than older models.
AII the companies had to _______ their expenses in response to the financial crisis.
In the new term,I'd like you to know the three different _______ to the study of math.
As you know, the output of cars in 2010 is five times _______ it was in 2000 in the factories across our country.
_______ medical issues, we also have to face moral and legal issues when cloning human beings.