【题目】The course normally attracts 200 students per year, ______ up to half will be from overseas.
A. of whom B. for whom C. with which D. in which
在线课程【答案】A
【解析】考查定语从句。句意：这门课程通常每年吸引200名学生，其中一半将来自海外。句中包含定语从句，先行词是200 students指人，此处表示这些人当中的一半，前加介词of，故选A.