2. 1. formal: He sent me a formal
letter.

3. 2. whistle: I whistle when I´m
happy.

4. 3. label: Look on the label.

5. 4. puzzle: This puzzle has 500
pieces.

6. 5. legal: The legal voting age is
18.

7. 6. angle: A right angle has 90
degrees.

8. 7. normal: Hot weather is
normal in July.

9. 8. needle: The needle was
very sharp.

10. 9. angel: The angel in the play
wears a halo.

11. 10. pupil: Is he a pupil at your
school?

12. 11. struggle: I struggle with
math work.

13. 12. level: Pitch a tent on level
ground.

14. 13. local: I often use our local
library.

15. 14. bicycle: My bicycle had a
flat.

16. 15. channel: Mary swam
across the channel.

17. 16. global: Scientists study
global warming.

18. 17. stumble: I often stumble
on this step.

19. 18. quarrel: My sister and I
quarrel.

20. 19. article: Did you read the
article?

21. 20. fossil: The dinosaur fossil
was old.