问题
选择题
The doctor will not permit him _____ until his foot is better.
A．walk
B．to walk
C．walking
D．walked
答案
答案：B
题目分析：句意：医生直到他的脚好些了才会允许他走。这里使用permit sb. to do sth.允许某人做某事.用不定式做宾语补足语。所以选B。
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