By nine o' clock ,all the olympic torch bearers had reached the top of mount Qomolangma

问题描述:

By nine o' clock ,all the olympic torch bearers had reached the top of mount Qomolangma
-----apeared a rare rainbow soon
a.oif which B.on which C from which D above which

选D 彩虹应该在mount之上那on which不行吗on和above有意义上的区别 above是空间的立体的上方 而on一般只平面的上方 如果用on意思就是彩虹在山上 而不是上的上方。