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You don’t know about the difficulty I had ______ the work then at all.
A:done
B:to do
C:for doing
D:in doing
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You
don
t
know
about
the
difficulty
I
had
the
work
then
at
all
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Some of the students in this class seem ______ to help those who have difficulties in their studies.
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Dick is very open-minded, ______ are all other members in his family.
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