III.

1. length

2. measure

3. width

4. widen

5. depth

6. weight

7. height

8. medicinal

9. healthy

10. unhealthy

11. toothache

IV.

1. What is your job?

2. What subject do you like most?

3. Nam always go to school early

4. What about going to the cafeteria?

5. You should go home and relax

6. My favourite pastime is watching TV

7. It's useful to know English

8. There are three big buildings in our school

9. Let's go to the zoo

III.

1. length

2. lengthen

3. width

4. widen

5. depth

6. heavy

7. height

8. medical

9. healthy

10. unhealthy

11. toothache 

IV.

1. What is your job?

2. What subject do you like most?

3. Nam always goes to school early.

4. What about going to the cafeteria?

5. You should go home and relax.

6. My favourite pastime is watching TV.

7. It's usefull to know English.

8. There are three big buildings in our school.

9. Let's go to the zoo!