Answer Key

一

1. import

2. export

3. porter

4. portable

5. incredible

6. credible

7. centennial

8. century

二

1. decade

2. bicentennial

3. millennium

4. million

5. reporter

6. port

7. credit

8. credentials

三

B B A D

四

1. reporter

2. decade

3. credentials

4. incredible

5. million

6. credit

7. incredible

8. credentials

9. credible

10. credentials

11. portable

12. port

13. exported

14. imported

15. millions

五

1. millimeter

2. centimeter

3. decimeter

4. decameter

5. kilometer

6. kilobyte

7. centipede

8. decimate

9. decimal

10. deportment

11. accredited

12. creed

13. creditor