Do you have any idea ______ is actually going on in the classroom?
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A
that
B
what
C
as
D
which
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Some scientists have questioned the theory ______ CO2 is causing dangerous global warming.
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A
which
B
what
C
that
D
why
What if we meet with a situation_____none of us are able to deal with?
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A
where
B
in which
C
what
D
that
6. I'll give you my friend's home address, _________ I can be reached most evenings. 7.
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A
which
B
when
C
whom
D
where