问题描述：
Much to my delight,( )seeing me,he walked up to
Much to my delight,( )seeing me,he walked up to me,smiling.
A.at
B.on
C.for
D.which
Much to my delight,( )seeing me,he walked up to me,smiling.
A.at
B.on
C.for
D.which
问题解答：
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