His mother doesn’t of her going to study in the United States alone.A. allowB. agreeC. pr

问题补充：

His mother doesn’t of her going to study in the United States alone.

A. allow

B. agree

C. prove

D. approve

答案：

A. allow

B. agree

C. prove

(答案→)D. approve

解析：A同意；B同意C证明D同意，批准；Ab两项都不和of连用；固定词组approve批准，同意；句意：他的妈妈不同意他独自一人去美国学习。