3.In nature some animals actively defend the area_____________they depend for the resources.
—Could I use your computer for a few moments, please? —. I’m not using it myself.
—Have you ___________? —No. I had the wrong number.
Mary went to the box office at lunch time, but all the tickets ____out.
You have failed two tests. You’d better start working harder, ____ you won’t pass the course.
—Did you return Fred’s call? —I didn’t need to ____ I’ll see him tomorrow.