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Is oxygen the only gas ________ helps fire burn?
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A
that
B
/
C
what
D
it
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It was April 1, 2001          William and Kate had their first baby.
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A
that
B
when
C
since
D
before
 The man showed us so heavy a stone _______ no man can lift.
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A
that
B
as
C
which
D
and
 Today’s teens don’t see anything strange in the fact _______the computer takes up a central place in their social lives.
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A
which
B
that
C
where
D
what
Betty always tells lies，___ her parents find strange.
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A
that
B
/
C
which
D
as
.She said ___ she ate little and ___ she was not hungry.
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A
that…/
B
/…./
C
/…that
D
it….that.