[单选题]We asked the professor about the criteria by which he classifies the animal species.
A.divides
B.categorizes
C.groups
D.defines

参考答案:B
本句意思是：我们询问教授是以何标准给动物种群分类的。classi行意为 “分类，归类”，如：Men in the post office classify mnail according to places it is to go.邮局里的人员将信件按寄送地点分类。divide意为“分离”，如：Divide the cauliflower into fiorets and wash them thoroughly.把菜花拼成小块，然后仔细把它们洗干净。categorize意为“把······归类”，如： Categorize the plants into four groups.把这些植物分成四类。group作为动词意为“分组”，并不一定是一根据对象的某种特性而分组，如：The fact sheets are grouped into seven sections.这些资料被分成了七部分：define意为“给······下定义”，如：He was asked to define his concept of cool.他被要求说明自己关于“酷”的定义。只有选项B同句中画线单词含义接近。