Tom went off to the EXPO Garden with his friends, ______an exciting day of discovering the unique culture of each nation．

A．expected

B．expecting

C．to expect

D．expects

压迫三叉神经导致原发性三叉神经痛的最常见血管是（）

A.小脑上动脉

B.小脑前下动脉

C.基底动脉

D.小脑后下动脉

E.岩静脉