On the long journey Peter a most interesting guide. We all had a wonderful time.A. pract

问题补充：

On the long journey, Peter a most interesting guide. We all had a wonderful time.

A. practiced

B. behaved

C. proved

D. conducted

答案：

A. practiced

B. behaved

(答案→)C. proved

D. conducted

解析：本题考查动词的用法。首先理解句子的意思：“漫长的旅途中，彼特被证明是一个很有趣的导游。我们都玩得很开心。”prove后接to be+形容词，to be可以省略。