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.