他成为了一群伪装成市政官员的犯罪分子的受害者。

He ___fell ___prey ___to a gang of criminals pretending to be council officials.

由于年轻人缺乏独立生活的经验，对社会问题如毒品和暴力认识不足，他们可能轻易成为想要剥削他们的成年人的猎物。

As young people do not have experience in living independently in society and are not fully aware of social problems such as drugs and violence, they may easily ___fall ___prey ___to adults who would like to exploit them.

许多投资者成为了这个欺诈计划的受害者。

Many investors ___fell ___prey ___to the fraudulent scheme.