第20题: [单项选择]______ having an advanced degree in molecular biology, Ms. Dempsey has led several research projects in biotechnology. A. Beneath B. Beside C. Besides D. Between 参考答案:C 答案解析:选项(C)besides是副词,意思是“在……之外”。选项(A)Beneath(在……下面)、选项(B)Beside(在……旁边)和选项(D)Between(在……之间)是指物体方位的介词。