Mary wanted to travel around the world all by herself but her parents did not her to do

问题补充：

Mary wanted to travel around the world all by herself, but her parents did not her to do so.

A. forbid

B. allow

C. follow

D. ask

答案：

A. forbid

(答案→)B. allow

C. follow

D. ask

解析：allow sb to do sth.允许某人做某事；forbid sb. to do sth.禁止某人做某事；ask sb.to do sth.请某人做某事。