The Burj Khalifa in Dubai is 828 meters high and there is no doubt        it’s the tallest building in the world. 
#67848
A
that
B
what
C
whether
D
which
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_________, I always feel I want a few more days.
#69097
A
However long is a vacation
B
However long a vacation is
C
However is a vacation long
D
However a vacation is long