_____ alone in the large house, the little boy had to learn to survive by himself.  [ ]

A. To leave        

B. Leaving              

C. Left                

D. Being left

根据广告目的与广告效果，广告可以划分为：（）。

A.知名广告

B.理解广告

C.确信广告

D.行动广告

E.强化广告