解析：
87.You would not have failed if you had followed my instructions
88.Despite the hardship he encountered,Mark never gave up pursuing knowledge
89.Scientists agree that it will be a long time before we find the methods of curing cancers
90.Production has to be increased considerably to keep pace with the constantly increasing demands of consumers
91.The more exercise you take,the fewer chances you will have of catching a cold
下一篇： 2015年春季四级讲义―英译汉翻译步骤