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四十天突破大学英语六级考试讲义与笔记词汇 50. Now a paper in Science argues that organic chemicals in the rock come mostly from ______ on earth rather than bacteria on Mars. A) configuration B) constitution C) condemnation D) contamination 注：2道理科题;2道文科题;1道环保题。 51. There is much I enjoy about the changing seasons, but my favorite time is the ______ from fall to winter. A) transmission B) transformation C) transition D) transfer 注：1. transmission 广播电视节目的传送;疾病的传播;文化的传递 2. transformation 变革 3. transition 季节的过度，时间的更替，社会制度的转型 4. transfer 转学，调任工作 52. I think we need to see an investment ______ before we make an expensive mistake. A) guide B) entrepreneur C) consultant D) assessor 注：consultant 顾问 53. The ______ on this apartment expires in a years time. A) treaty B) lease C) engagement D) subsidy | 
