They gave me so much help, without ____ I couldn't have succeeded last year．
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A
them
B
which
C
it
D
that
推荐题目
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
In English class, our teacher often creates an environment _____________ we are given the opportunity to solve problems ourselves.
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A
when
B
which
C
where
D
that
The road construction is based on the agreement, one of _______ purposes is to ensure its completion on time.
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A
which
B
whose
C
that
D
what
The villagers dug many tunnels _____ they could fight against the enemies.
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A
by which
B
through that
C
through which
D
to which