1.        By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ___________ appeared a rare rainbow soon. 2.        
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A
of which
B
on which
C
from which
D
above which
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You have to leave now _________ you can catch the early bus.
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A
so that
B
as soon as
C
because
D
if
________, it began to rain unexpectedly.
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A
While cleaning the machine
B
To clean the machine
C
He was cleaning the machine
D
While he was cleaning the machine
The doctor ______ she sent her friend is very famous.
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A
to whom
B
to whose
C
whom
D
at whom