参考答案
4. 76. serious→seriously 77. to→into 78. √ 79. in→on
80. take→get 81. such→so 82. stopping→stop 83. water前加the
84. paid前加been 85. 去掉more
5. 76. 去掉a 77. have后加been 78. exam→exams 79. was→were
80. strong→strongly 81. too→so 82. 去掉of 83. live→living
84. √ 85. fact后加that
6. 76. something→anything 77. healthy→health 78. which→when或which前加in
79. start→starts 80. when后加to 81. 去掉was 82. √
83. 70-year-old前加a 84. What→As 85. public’s→public