The policeman came up to the house, whose door was open, _____ there for a while, and went in

So hard-working _____ that hesets a good example to all the other classmates

I wonder how much you _______for your services. —Well, the first two are free while the third costs $30 .

With the good care taken by doctors and nurses, many patients are beginning to _________.

_____ is known to all is that good friends _____happiness and value to life.