第33题: [单项选择]It was believed that people or things in the UFO's took ______ of people, ships and planes from the earth. A. examples B. models C. shapes D. samples 参考答案:D 答案解析:example意为“榜样,例子”,指作为整体的一组事物的代表;shape意为“形状,式样”,指用来给出或确定形式的某物;model意为“模型”,指一个计划的初步产品或结构;sample意为“样本,实例