51. She said that she was watering the flowers in the garden when the telephone rang.
52. How about going to the cinema tonight, Doug.
53. The front door must be locked by the residents by 11 o'clock at night at the latest.
54. You will miss the train if you don't leave on time.
55. How long has it been since you went to the theatre last time?
56. Vanessa isn't used to send text messages.
57. The dentist apologised that he cancelled the appointment.
58. It is a flight from Sofia to Athens which duration is an hour.
59. It can't be Jack who broke the living room window.
60. If only you could go to Vicky's birthday party yesterday.