What worried the child most was to visit his mother in the
hospital.
A. his not allowing
B. his not being allowed
C. his being not allowed
D. having not been allowed
网友回答
A. his not allowing
(答案→)B. his not being allowed
C. his being not allowed
D. having not been allowed
解析：本题考查动名词的用法。由于allow与逻辑主语child形成被动关系，再者，动名词的否定形式是not+动名词构成。