air quality in urban areas from one to five:excellent, fairly good, slightly polluted, poor, and dangerous

I often have hamburgers for mybreakfast.——–You’d better not. It’s bad for you_________ too much junk food.

The old people enjoy______ up early, butthe young people______.

The rain had cleared the air, and the grass ______ fresh and sweet.

Reportedly yesterday a group of American soldiers were walking along the road in Iraq when a bomb was _____, three of whom were killed.