六级词汇笔记单选题词汇解析05

　　49.Whether you live to eat or eat to live, food is a major _______ in every familys budget.

　　A.nutrition

　　B.expenditure 花费 费用

　　C.routine 例行公事 常规

　　D.provision 供应量

　　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 结构 分布形状

　　B.constitution 宪法 事物的一般结构

　　C.condemnation 批评 责难

　　D.contamination 化学污染 放射性污染

　　51.There is much I enjoy about the changing seasons, but my favorite time is the ________ from fall to winter.

　　A.transmission

　　B.transformation 转变

　　C.transition

　　D.transfer