By nine o’clock, all the Olympic torch bea
题型：单项选择题
问题：
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
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