29. The police continued to watch the house.=> the police carried..... 30. Mr. John gave an interesting speech. => mr john spoke...... 31. The sight was right in front of him but he didn't notice it.=> although ....... 32. The woman was terribly upset. He dog was run over. => the woman whose...., 34. Les't go abroard for our holiday this year. =>why........ 35. I fall asleep as the film was so boring. => I fall asleep because of....... 38. My students are very good at mathematic. => my students study..... 39. This is the most modern building in this area. => no building...... 40. I asked the students to complete these tasks yesterday. => I had these.... 47. John drives more carefully than his brother. => john's brother doesn't ....,, 48. They were such difficult questions that we couldn't answer them.=> the questions were so....,, 49. Lan didn't go to the school last Monday because she was sick => because of..... 50 why don't you bring your brother to the party? => I suggest.....