Without facts, a person can not form a correct opinion, for he needs to have actual knowledge ______his thinking .
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A
on which to be based
B
on which to base
C
which to be based
D
which to base
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I admire my English teacher. I can remember very few occasions ________ she stopped working because of ill health.
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A
that
B
when
C
where
D
which
The place ______ you are going to visit is the ruins (废墟) of the World Trade Center.
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A
which
B
at which
C
where
D
in which
The woods are remains of a huge forest once covered the whole area.
#75349
A
where
B
which
C
whose
D
when