Europe has achieved more in controlling the AIDS virus than Asia in the past ten years, _______the number people infected with the virus is going up sharply.
#72269
A
when
B
that
C
which
D
where
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This is the very knife _____ I used to cut apples yesterday.
#73482
A
that
B
by which
C
which
D
with which
Why not stay at home the road is so slippery after the heavy snow?
#69407
A
when
B
unless
C
even if
D
now that