.In this experiment, they are woken up several times during the night, and asked to report what they＿＿＿＿. 

 If this product does not give you complete satisfaction, please return it to the manufacturer, stating when it ________.

(2014·安徽七校联考)It is difficult for children to change their eating habit later in life.________，parents should encourage healthy eating from an early age.

 Every few years, the coal workers                 their lungs X-rayed to ensure their health.

. --- Is Tom still smoking?　--- No. By next Saturday he ______ for a whole month without smoking a single cigarette.