—What made little Tony so unhappy and cry in his room?
— to go hiking with his brother.
A. Having not been allowed
B. Not having allowed
C. Having not allowed
D. Not having been allowed
网友回答
A. Having not been allowed
B. Not having allowed
C. Having not allowed
(答案→)D. Not having been allowed
解析：现在分词的完成时态的否定式，直接在最前面加否定词：not 。所以选择：not having been allowed。句意：——什么事情让小托尼那么不开心，在房间里哭呢？——没有被准许跟他的兄弟一
块儿去远足。