______ time went by, his illness was getting worse.

____time goes by, Mother’s hair is turning gray and the wrinkles on her face deeper.   

The government is trying to reduce people’s fear _________ they are likely to be affected by  the nuclear radiation.

Along with the letter was his promise   he would visit me the New Year.

_____ the city’s public school system should be open to the children of migrant workers has become the focus of discussion.