根据下表判断句子正误，正确的在括号里打“√”，错误的打“×”。

( ) 1. — What's Zhou Jielun's hobby?  — He likes swimming.

( ) 2. — What's Yang Liping's hobby?  — She likes dancing.

( ) 3. — What's Lang Lang's hobby?  — He likes playing the piano.

( ) 4. — What's Guo Jingjing's hobby?  — She likes playing chess.

试述行文方式。