9. It can be quite difficult to clearly _______________ abstract ideas such as love or friendship.

5. The _______________ of the heart is to pump blood throughout the body.

13. When you didn't come to work I just _______________ that you were sick.

30. It is generally quite difficult to raise a family on a single _______________ in Canada today, so very often both parents work full-time.

28. I think that the _______________ of students that have to repeat a level in this program is usually about 25% or less.

19. Many _______________ now believe that vocabulary development is even more important than grammar study for second language learners.

10. I don't think hitting children is a very effective _______________ of teaching them anything.

8. Attention passengers on flight 514 to Honolulu. Please _______________ to gate 33 where your plane is now boarding.

22. He is a well-known _______________ on the language used by bees to communicate the location of food.

7. His _______________ for the renovations to our house was $2,250.

21. Management is meeting with _______________ to begin discussions on a new contract.

29. In the future, Canada will be under great pressure to _______________ fresh water to the United States.

6. The grammar notes appear in the back _______________ of the book.