16.　 Mary is the oldest of three sisters. (old)

15.　 Computers can work out problems far more quickly than human beings. (quick)

14.　 Every morning my grandpa spends half an hour watering the flowers. (water)

13.　 What is the postage of the parcel? (post)

12.　 Did you enjoy yourself at yesterday's party? (you)

11.　 　　　　" Don't play football in the street." The policeman shouted at the children angrily. (angry)

10.　 Computers are becoming more and more useful in our life.( use)

9.　 December is the twelfth month of a year. (twelve)

8.　 Our life today is much better than before. (good)

7.　 We are truly thankful for all your help.(true)