China is trying to find ways to take care of the children parents have left their homes to work in cities.
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A
that
B
who
C
whose
D
which
推荐题目
I’ll never forget the lesson ______ last year.
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A
that I learn
B
that I learned
C
what I learn
D
what I learned
Last month, doctors used a 3-D printer to rebuild the face of a person ____ had a bad accident.
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A
/
B
which
C
whom
D
who