--Was the driving pleasant when you vocationed in Mexico last summer?

----No, it ___ for four days when we arrived, so that the roads were very muddy.

A．was raining

B．had been raining

C．would be raining

D．have rained

睫状神经节之感觉根（长根）通过何处进入眶内（）

A.眶下裂

B.圆孔

C.眶上裂

D.筛孔

E.视神经孔