她去帮助一个被困在车里的人。

She went to the ___aid of a man trapped in his car.

他申请了大学经济援助。

He applied for financial ___aid for college.

如果你有任何困难，不要犹豫请求我的帮助。

If you have any trouble with something do not hesitate [i]n requesting my ___aid.