It is still under discussion __________the old bus station should be replaced with a modern hotel or not.

A．whether

B．when

C．which

D．where

流行性角膜结膜炎可能是哪类病毒引起（）

A.腺病毒

B.疱疹病毒

C.巨细胞病毒

D.肠道病毒70型或柯萨奇病毒

E.E-B病毒