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The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
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A
what
B
which
C
that
D
though
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 It is in the Future Mall where you bought a coat ____ her sister works.
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A
which
B
when
C
where
D
that
You can depend on whatever promise _______ he makes.
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A
/
B
why
C
when
D
whose
“Drive-ins” have large parking lots ______ customers are served in their cars by waitresses．
#69007
A
who
B
when
C
which
D
where
 Is this factory _____ you visited the other day？
#72046
A
the one
B
that
C
where
D
when
________, as long as I’m with nature, I don’t care.
#67906
A
However tough the journey is
B
Whatever tough the journey is
C
However the journey is tough
D
Whatever the journey is tough