单选题 ______ having an advanced degree in molecular biology, Ms. Dempsey has led several research projects in biotechnology.
A. Beneath
B. Beside
C. Besides
D. Between

【正确答案】 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。