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
网友回答
D解析本题考查“介词+关系代词”的定语从句的用法。根据句意，在珠峰的上方出现了罕见的彩虹，排除A、C项，B项指位于某物上而且与其表面接触，其位置不一定在上方。故选D。