介词的判断方法 1.从句中动词与介词和先行词与介词的搭配关系，如： e.g. Is that the newspaper for which you often write articles? 2. 根据从句中动词或形容词的习惯搭配，如： e.g. He is the only person of whom his parents are proud in the world. 3. 根据先行词与介词的搭配习惯，如： e.g. 1949 was the year in which the P.R.C. was founded.,Fill in the blanks with proper prepositions: 1. The sun gives us heat and light, _ which we cant live. 2. The student _ whom we were talking just now is the best student in our class. 3. Ill never forget the day _ which she said good-bye to me. 4. Who can give me the reason _ which he hasnt turned up yet? .,without,about,on,for,