up early in the morning to have a walk, I am sure, you are likely to feel active all day．
A. Get
B. Having got
C. Getting
D. To get
网友回答
A. Get
B. Having got
(答案→)C. Getting
D. To get
解析：考查非谓语动词，I am sure 为插入语，you 与get之间是主谓关系，故用现在分词Getting，句意：我确信你在早晨早点起床去散步，你很可能一整天感到精神焕发。Getting up early in the morning to have a walk在句中作原因状语。故选C。