Ⅱ. 单项填空(共15小题; 每小题1分，满分15分)
21. Honestly speaking, it is my teacher’s_____ that made me finally take up my present career as a biology researcher.
A. advantage B. influence C. taste D. guard
【解析】选B。考查名词辨析。句意：是老师的影响让我最终从事了现在的生物研究员事业。advantage优势；influence影响；taste口味；guard警戒。
