找出下列句子的一处 语法错误：

　　Moreover, there would also exist opportunities to meet some local friends who would be perfect guide to help make a trip more complete. We can learn about different cultures from local residents, and their advice would be invaluable to us since they are more familiar with the local environment.

　　♜ 适用考题：

　　Which of the following three factors contributes the most to an enjoyable vacation? a. good food b. good location c. good friends to travel with you. (2013.4.14)