up early in the morning to have a walk I am sure you are likely to feel active all day

问题补充：

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

答案：

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。