They arrived at a farmhouse，in front of ________ sat a small boy.
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A
whom
B
who
C
which
D
that
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In the end, she decided to sell the house the windows were almost all broken.
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A
whose
B
of which
C
that
D
which
The old lady had a son and two daughters，________treated her well，which made her very sad.
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A
no one of whom
B
none of whom
C
neither of them
D
none of them
We should consider the students’ request_____ the school library provide more books on popular science.
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A
when
B
which
C
that
D
where
The company has recently taken on fifty new workers some of_______ have just graduated from university.
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A
which
B
them
C
those
D
whom
The doctor __________ she sent her friend is very well known.
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A
by whom
B
at whom
C
whom
D
to whom