—When did the great earthquake in Wenchuan happen ?

—It happened __________14:28 __________the afternoon of May 12, 2008.

A．on, in

B．at, on

C．at, in

D．on, on

关于贝尔面瘫描述正确的是（）.

A.不伴有其他症状或体征的突发性单侧面瘫

B.起病急骤，少自觉症状

C.口角肌抽搐

D.患侧口角下垂、健侧向上歪斜；不能吹风、鼓气}眼睑闭合不全

E.有的患者额纹存在