21. The jawbone was our most u______ discovery.

20.The Christmas v_____ is always what I expect.

19. As is u_____ with children, they soon got tired.

18. Vedios are u_____ things to have in the classroom.

17. When did this word come into common u______?

16. M_____ every chance you have to speak English .

15. The boat floated bottom u_____.

14. I was u______ when it happened.

13. Christmas is almost u_____ us again.

12. U_____ she spoke, I hadn’t realized she was foreign.