— I am going to be a volunteer at the 2012 London Olympic Games.

— ________! Me, too.[ ]

A. That's it      

B. Don't worry

C. Good luck    

D. That's great

胃泌素不具有下列哪项作用（）。

A.促进胃酸分泌

B.促进胃蛋白酶原分泌

C.抑制胆囊收缩

D.促进胃的蠕动

E.对胃黏膜具有营养作用