Great changes have taken place in that school. It is no longer it was 20 years ago，_____ it was so poorly equipped．
#76103
A
what；when
B
that；which
C
what; which
D
which；that
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She is the only one of the persons ________ from the mistakes.
#78522
A
whom I know have learned
B
whom I know has learned
C
I know who has learned
D
I know who have learned
Many countries are now setting up national parks _ animals and plants can be protected.
#75498
A
which
B
whose
C
when
D
where
The factory produces two million pairs of shoes every year, half _______ are sold abroad.
#77856
A
of which
B
which of
C
of them
D
of that
His teacher is the only one ______ he can turn when he is in trouble.
#78032
A
in whom
B
to whom
C
for whom
D
from whom