单选题 I am ______ by his ______ attitude after hearing his words.
【正确答案】 C
【答案解析】[精解] 本题考查puzzled和puzzling的区别。puzzled常用来修饰人,指人的内心感觉“感到困惑不解的”;puzzling常用来修饰事物,指事物的性质“令人困惑的”。