---Mr Wang enjoys ______ jokes and often makes us _______.

---So he is. He is also friendly.

A．to tell ,to laugh

B．tells, laugh

C．telling ,laugh

D．telling,laughing

（）是指每一部规范性法律文本在法律体系中的纵向等级。

A.法律体系

B.法律位阶

C.法律冲突

D.法律法规