问题描述：
Your parents are the persons _ you should give great love.
A,that B,whom
C,who D,to whom
Do you know the boy called Jim Green?
Do you know the boy _ _ _ Jim Green?
A,that B,whom
C,who D,to whom
Do you know the boy called Jim Green?
Do you know the boy _ _ _ Jim Green?
问题解答：
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