Eye doctors recommend that a child’s first eye exam ____at the age of six months old.
I would have paid a visit to you _______ possible.
A successful life is a life ____ challenges are met and difficulties overcome.
After suffering a heart attack, Michael Jackson was pronounced dead, ____ a tragic end to the world' s most popular entertainer.
The magnificent tower must be saved, ________ the cost!
After supper she would sit down by the fire, sometimes _____ an hour, thinking of her young and happy days.