考查above which的一道高考題

下面一題是福建卷的一道高考題：

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】答案為D。根據常識可知，rainbow應該是在山的上方，故用above。句中的above which appeared a rare rainbow soon為非限制性定語從句，且該從句是一個倒裝句，為便于理解，此句可改寫為：and soon a rare rainbow appeared above Mount Qomolangma. 全句意為：所有的奧運火炬手都在9點鐘前就到達了珠穆朗瑪峰，其后不久，山頂上的天空出現了罕見的彩虹。