4. ( ) you do, do it well.

1. If anybody ( ) me while I＇m out, tell him I＇ll call him back later on.

17. ( ) is known to the world, Mark Twain was a great American writer.

16. The letter ( ) I mailed to my sister a month before Christmas has not yet reached her.

15. I＇ve never dined with you, sir; and I see no reason ( ).

14. She was extremely understanding, ( ) helped to calm James down.

13. He arrived late, ( ) was annoying.

12. Angel was the first girl ( ) when you got here.

11. English words are not always spelled ( ).

10. The seventeenth century was one ( ) many significant advances were made in both science and philosophy.

9. "Do you know Tom?"“I think so. Isn＇t he ( ) smokes incessantly(不停地)?"