Birds of a feather flock together.

　　Meaning: People of the same type seem to gather together.

　　汉语中意思接近的有：物以类聚，人以群分。

　　描述要点：选择几个有代表性的方面，点出两个人在这些方面都十分相近，由于气味相投，两人变得彼此难解难分。

　　Decide which of the two versions given below you think is the better one. Why?

　　Zai and Wang are friends, Zai is my son, 3 years old and Wang is our puppy. Every dawn, Zai must wake up when Wang barks and let me pass water for them, then they begin frolic to mess up the house. Zai watches TV, Wang sits beside him quietly. Zai takes bath, Wang jumps//into//the bathroom. Zai plays with the toys, Wang carries the toys for him, etc. They are always together.

　　Lately, I fell something wrong. Zai prefers sleeping with Wang to me. If Zai has a matter, he barks instead of crying. Especially, Zai always bites me when he is glad, crying, something like that. Sometimes he hurts me.

　　Version B

　　Zai, my three-year-old, and Wang, our puppy, are friends. Every morning, Zai must wake when Wang barks so he can take a leak, then they begin to play around and generally mess up the house. While Zai watches TV, Wang sits peacefully beside him. When Zai takes a bath, Wang frolics around in the bathroom. When Zai plays with the toys, Wang carries the toys for him, etc. They are constant companions.

　　But recently something seems not quite right. Zai would rather sleep with Wang than with me.When Zai has a problem, he barks rather than cries. But most peculiarly, Zai always bites me now when he's happy, crying, or whatever. Sometimes he actually hurts me. It seems that not just people of the same type tend to associate with each other.

　　注解：

　　take a leak:撒尿(常被视为粗俗的说法)

　　frolic: to play happily嬉戏

　　companion: a friend同伴，伴侣

　　If你can't赢them, join them: If you can't打败your对手，join forces with them.