—Where is Tom ?

—Well , he       you          here . Otherwise he would come down right now .

A．didn’t know ; were

B．hasn’t known ; are

C．doesn’t know ; are

D．hadn’t known ; were

周围性与中枢性面瘫的区别是前者：（）

A.患侧不能皱额、整眉、闭眼

B.患侧鼻唇沟变浅

C.患侧Bell征（+）

D.不伴同侧偏瘫

E.可伴同侧外展神经瘫及对侧肢体瘫