She was just about to explain ___ she hadn't passed her maths test chiefly out of carelessness ___ her uncle came.

A．her mother … when

B．to her mother why … that

C．her mother that … when

D．to her mother that … when

引起昼盲的疾病有（）

A.全色盲

B.轴性视神经炎

C.虹膜后粘连

D.维生素A吸收障碍

E.病理性瞳孔散大