Now the air in Yancheng is _______ than it used to be . We should do something to stop it .
She didn’t go to work ______ that morning. She slept ______ noon.
He was ill _____ a week, and _______ the week he ate almost nothing .
Days are longer ______ summer than ___________ winter.
Tom and Paul usually watch TV ______ weekends.
Every day the old man takes these children home _____ school.