1. My brother doesn’t buy that car because he doesn’t have enough money.  ................................................................................................................................................. 2. We don’t go out because it rains.  ................................................................................................................................................. 3. They didn’t understand the problem. They couldn’t find a solution.  ................................................................................................................................................. 4. Because you spoke English unnaturally, they did not understand you.  ................................................................................................................................................. 5. I don’t know his address, so I can’t contact him.  ................................................................................................................................................. 6. It’s too cold, so we can’t go swimming.  ................................................................................................................................................. 7. She didn’ t hurry, so she missed the train.  ................................................................................................................................................. 8. John was fat because he ate so much junk food.  ................................................................................................................................................. 9. The exercises are very difficult, that’s why I can’t finish in fifteen minutes.  ................................................................................................................................................. 10. She can’t go to the meeting because she is busy.  ................................................................................................................................................. 11. They didn’t have enough time. They could not do me a favor.  ................................................................................................................................................. 12. Peter got bad marks because he didn’t prepare his lessons well.  ................................................................................................................................................. 13. Because I don’t meet her, I don’t give her your letter.  ................................................................................................................................................. 14. They are slow, so they can’t win the mach.  ................................................................................................................................................. 15. He didn’t apply for the job because he didn’t have enough qualifications.  ................................................................................................................................................. 16. We couldn’t buy this car because it was very expensive.  ................................................................................................................................................. 17. She is weak, she can’t take any exercise.  ................................................................................................................................................. 18. People don’t understand him because he doesn’t speak clearly.  ................................................................................................................................................. 19. Rita was exhausted because she didn’t get any sleep last night.  ................................................................................................................................................. 20. The flats were not clearly numbered, so it was very difficult to find anyone.  .................................................................................................................................................