88. Despite the hardship he encountered, Mark never ___（放弃对知识的追求）
abandoned the pursuit of knowledge.
89. Scientists agree that it will be a long time before____（我们找到治愈癌症的方法）
We find the cure for cancer.
90. Production has to be increased considerably to ___ . （与消费者不断增 2009年12月英语四级翻译答案（北京新东方） 标签：
