---- Do you know our town at all?----No, this ________ the first time I _________ here.

Prices____ all the time and no one knows when they         stable.

—Did you have a good time meeting your old friends yesterday? —Yes, I did. I        them since we graduated from college.

Every possible means       to prevent the air pollution, but the sky is not still clear.

Not only John and Tom but also their sister, Mary, ______great interest in the piano lessons.