5. d

6. d

7. c

8. c

9. c

10. b

11. d

12. d

5.If you are not careful, the baby will wake up.

6.If you don’t do your homework carefully, you will be punished by your teacher.

7.If I buy a new hat, I’ll give it to you.

8.Unless he works hard, he won’t pass the examination.

9.I prefer playing football to watching it.

10.If you get up late, you will go to school late.