He gets up early in morning but goes to bed late at night.A the ． a B． / ． the C． the ．

问题补充：

He gets up early in morning, but goes to bed late at night.

A． the ． a B． / ． the C． the ． /

答案：

解析：固定搭配，in the morning，和at night是固定用法表示在早晨和在晚上。