Which

1. C

2. B

3. B

4. B

5. C

6. B

5.

1. A

2. A

3. D

4. B

5. D

6. B

7. B

8. A

x + 3.(x - 1) = 4

x + 3x - 3 = 4

x + 3x = 4 + 3

4x = 7

x = \(\dfrac{7}{4}\)

1. build => builds => built

2. come => comes => came

3. buy => buys => bought

4. call => calls => called

5. fly => flies => flew

6. drive => drives => drove

7. draw => draws => drew

8. read => reads => read

9. write => writes => wrote

10. fall => falls => fell

11. get => gets => got

12. go => goes => went

13. hear => hears => heard

14. listen => listens => listened

D

52 m² = 5200 dm²

3684 dm² = 36 m² 84 dm²

7 km² = 7000000 m²

20 dm² 8 cm² = 2008 cm²

4 ha 5 dam² = 40500 m²

6500000 m² = 650 ha

510 triệu km²