问题描述：
By nine o'clock,all the Olympic torch bearers had reached the top of Mount
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
B怎么错了?
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
B怎么错了?
问题解答：
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