It  was  about  600  years  ago ______the  first  clock  with  a  face  and  an  hour  hand  was  made .   
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A
that
B
until
C
before
D
when
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 It was only with the help of the local guide __________.
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A
was the mountain climber rescued
B
that the mountain climber was rescued
C
when the mountain climber was rescued
D
then the mountain climber was rescued