下列不参与构成Guyon管的是（）。

A.头状骨

B.钩骨

C.屈肌支持带

D.小鱼际腱弓

E.豆状骨

— Hello, this is Tina speaking. Is that Sam? 

— Sorry, he isn't here at this moment. _____? [ ]

A. Can I take a message

B. What are you saying to Tina

C. May I speak to Sam

D. Who's that speaking