What worried the child most was to visit his mother in the hospital.A. to his being allow

问题补充：

What worried the child most was to visit his mother in the hospital.

A. to his being allowed

B. his not being allowed

C. not his being allowed

D. not his allowed

答案：

A. to his being allowed

(答案→)B. his not being allowed

C. not his being allowed

D. not his allowed

解析：动名词符合结构。动名词的否定式是在doing前面加not,所有格是在前面加one’s.句意：最让孩子们担忧的是不被允许去医院看望妈妈。