答案与简析：
　　76. famous前加上a。 （名词数）。 77. 正确 78. we前面加when，引导一个时间状语从句。（句子成分多分析） 79. them→us （逻辑错误须关注） 80. visiting→visited（非谓动词细辨别） 81. picture→pictures（名词数） 82. passes→passed（动词形） 83. 去掉down（习惯用法要记住） 84. and→but（but, and, or和so） 85. 去掉at（句子成分多分析 / 习惯用法要记住）。
(一)
Most families in China hoped their single children will          76．_______
have a happy future, so they are very strict in their children.  77．_______
So do teachers in schools! Many children are given so much       78．_______
homework that they have hardly any spare time have sports.       79．_______
The children are forbidden to do anything but to study. No       80．_______
wonder so many children are tired of lessons. Some even          81．_______
attack or kill his parents and teachers! I believe many people   82．_______
already read this kind of news in newspapers or magazines.       83．_______
Shouldn't we draw lesson from the accidents? Now our             84．_______
government is making out a plan to solve the education problems. 85．_______