题目

________to our surprise, he went over all his notes in such a short time, ________for the next day's examination. A. Very; preparing  B. Much; prepared C. Greatly; to be prepared  D. Rather; being prepared 答案：B下列物质加入AgNO3溶液能产生白色沉淀的是A．C2H5ClB．NH4ClC．CCl4D．CH3Cl与NaOH水溶液共热的混合液