单句语法填空

1.It was foolish of him to refer        his notes during that important test, and as a result, he got punished.

2.This is an old building dating back        the 16th century.

3.Your software is out         date and it's time for an upgrade!

4.The boy used to be referred to        clever.

5.I have        large number of books and         number of them is still increasing.

6.To repair this cupboard，you will need        number of specific tools.

7.The heavy storm struck my town，leading         a heavy loss.

8.The history of this custom can date back         thousands of years ago.

9.In his speech he referred         the great help our country received from the supporters of the world.

10.He is famous        his humour.