She was surprised to find the fridge empty；the children everything !A. had been eating B.

问题补充：

She was surprised to find the fridge empty；the children everything !

A. had been eating

B. had eaten

C. have eaten

D. have been eating

答案：

A. had been eating

(答案→)B. had eaten

C. have eaten

D. have been eating

解析：考查句子结构。本题的关键是标点符号。分号说明后面是一个新的句子。再根据事态可知孩子们吃完一切是在他发现之前，所以使用过去完成时。