74. As long as you keep calm, you will pass the writing test.
75. We spent three hours opening the door

1. 
   76.I made these bookshelves by myself
   77.much as I admire her archievement, I don’t really like her
   78. My English friend isn't used to using chopsticks
   79. George told Mary that he had seen the film three times
2. my brother didn’t use to study as than he does now
3. to shut the door, not to lock it
4. No matter how intelligent you may be, you should be careful about this.
5. what the headmaster said is very ressuring

=>
74. As long as you keep calm, you will pass your driving test.
75. We spent 3 hours opening the door.
76. I made these bookshelves myself.
77. In spite of admiring her achievement, I don't really like her.
78. My English friend isn't used to using chopsticks.
79. George told Mary that he had seent he film three times.
80. My brother didn't use to study as hard as he does now.
81. He asked me to shut the door.
82. No matter how intelligent you may be, you should be careful about this.
83. What the headmaster said was very reassuring.