题目

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 答案：B 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。

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