下面一题是福建卷的一道高考题： By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ______ appeared a rare rainbow soon. A. of which B. on which C. from which D. above which 【分析】答案为D。根据常识可知，rainbow应该是在山的上方，故用above。句中的above which appeared a rare rainbow soon为非限制性定语从句，且该从句是一个倒装句，为便于理解，此句可改写为：and soon a rare rainbow appeared above Mount Qomolangma. 全句意为：所有的奥运火炬手都在9点钟前就到达了珠穆朗玛峰，其后不久，山顶上的天空出现了罕见的彩虹。