Copernicus’s theory is now the basis ______ all our ideas of the universe are built.
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A
to which
B
on which
C
for which
D
by which
推荐题目
Wind power is an ancient source of energy ____we may return in the near future.
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A
on which
B
by which
C
to which
D
from which
Anyway, that evening, ______ I’ll tell you more about later, I ended up staying at Rachel’s place.
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A
when
B
where
C
what
D
which
I still remember the house _____my mother and I used to stay in that evening．
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A
where
B
which
C
in that
D
the one
The old professor has three sons，________are doctors.
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A
all of them
B
all of whom
C
all of that
D
all of which