11. I’d like to go with you tonight but I am very busy.  _____________________________________________________________________________ 12. She wasn’t able to answer the questions, so she failed the exam.  _____________________________________________________________________________ 13. Peter was very nervous and failed the driving test.  _____________________________________________________________________________ 14. I can’t tell you what time it is because I don’t have a watch.  _____________________________________________________________________________ 15. She didn’t learn mathematics; that’s why she was cheated by that salesman.  _____________________________________________________________________________ 16. We missed the train because the clock wasn’t right.  _____________________________________________________________________________ 17. The dress is very expensive, so she can’t buy it.  _____________________________________________________________________________ 18. The teacher was very angry. His pupils did their homework carelessly.  _____________________________________________________________________________ 19. I never feel lonely because I have lots of good friends.  _____________________________________________________________________________ 20. We didn’t go on holiday because we didn’t have enough time.  _____________________________________________________________________________ 21. We got lost because we didn’t a map.  __________________________________________________