第30题: [单项选择]The teacher often warns the students that they can't be ______ careful in doing experiment. A. much B. most C. so D. too 参考答案:D 答案解析:[译文] 老师经常提醒学生做试验再仔细也不为过。 [解析] 考查副词的固定搭配。can't，can never与too连用，表示“再……也不为过，越……越好”，故答案为D)。
第34题: [单项选择]The team of doctors wanted to find out ______. A. why certain people age sooner than others B. how to make people live longer C. the size of certain people’s brains D. which people are most intelligent 参考答案:B 答案解析:[解析] “If you want to stay young，sit down and have a good think．，”本篇是说思考能让人变得越来越年轻，答案B最符合题意。
