Test analysis: The story of "Boya Guqin, son Yin Zhi" is that Yu Boya is good at playing the piano and Zhong Ziqi is good at listening. Yu Boya thought, Zhong Ziqi will know his mind. Expressed the meaning that bosom friends are hard to find. So option b is the correct answer. The other three options have nothing to do with the stem, so they should be excluded.

Comments: This topic is based on the old saying, which embodies the humanistic characteristics of ideology and morality, and can guide students to know the importance of friends, and then actively communicate with others and make friends. This topic has a practical guiding role for students to make friends.