My father went to the post office to pick up the letter.A. in publicB. in forC. in personD

My father went to the post office to pick up the letter .
A. in public
B. in for
C. in person
D. in trouble

A. in publicB. in for(答案→)C. in personD. in trouble解析：in public公开地，当众；in for从事，免不了遭受；in person亲自，外貌上；in trouble处于不幸中，处于困难中。句意：我父亲亲自去邮局拿信。结合语境可知选Ｃ。

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