— Did you go to the lecture by the visiting professor?— No. I ______ it, but I've been busy taking care of my grandma in hospital these days.
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.