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答案选D,为什么B不对,请详细解答,谢谢!

by ,it's ,nine ,clock ,no .1,my,o'clock.连成一句话. School at nine o’clock School ______at nine o'clock. School s____at nine o'clock. It is nine o clock . nine o' clock 的意思 nine o clock in the She has finished all her work by 8 o'clock. We must _____(get)there by nine o'clock tomorrow morning I have to finish my homework ( )nine o'clock.A by B untilC ago D after I have to ____ (be)in bed by nine o' clock I had reached the British Museum by nine o'clock为什么不用arrived By nine o’clock,all the Olympic torch bearers had reached the top of Mount Qomolangma,（ ）appeareBy nine o’clock,all the Olympic torch bearers had reached the top of Mount Qomolangma,（ ）appeared a rare rainbow soon.A.of whichB.on whichC.fr By nine o'clock,all the Olympic torch bearers had reached the top of MountBy 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 whichB怎 by ten o'clock School starts at nine o'clock. what____he____do at nine o'clock yesterday?(do) it's nine o'clock翻译?