The black hat is sale. You can buy one only two dollars.[ ]

Sally, could you go and help your father wash the car?—Why ____________? I’m busy now. Amy is lying on the grass doing nothing.

People who eat a balanced diet should be ________ than those who only eat hamburgers.

It was too cold and windy , so we could see ____ people walking in the street .

How many computers are there in the room?—__________. Some workers moved them to another place just now.