The question that puzzled them is ____ they can get rid of the air pollution in the area.
After reading a book or a magazine in the reading room , put it back_____it was.
Only with this method_____to make progress in your maths study .
The best way for starting a person’s breathing is to use______way
The question will also calm the person ,______him or her know that help is on the way .
.His words were_____out by loud cheers from the crowd