It is said that many kids are worried about the year 2012, _____ , they think the earth will be destroyed by disasters．
#78153
A
where
B
as
C
when
D
which
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Tom's first job was at a local restaurant in his early twenties，________he worked for seven years.
#75556
A
where
B
when
C
which
D
that
Leaving behind family members, these farmers are strangers to the cities ______ they work.
#77746
A
in that
B
at which
C
where
D
which
Wind power is an ancient source of energy we may return in the near future.
#77113
A
on which
B
by which
C
to which
D
from which
The freezing point is the temperature __________ water changes into ice.
#77034
A
atwhich
B
when
C
inwhich
D
ofwhich