题目

---- It seems that Jimmy is feeling bad about the exam. ---- He needs to _________. A “C” is not the end of the world.          A. cheer himself up          B. calm himself down          C. let himself down           D. warm himself up 答案：AA. 农村经济结构变化B. 自然经济丧失主导地位C. 政府确立重商政策D. 手工业演变成主流产业