(2013·陕西宝鸡二检)The course about Chinese food attracts over 100 students per year, up to half are from overseas.
A. in which
B. for whom
C. with which
D. of whom
网友回答
A. in which
B. for whom
C. with which
(答案→)D. of whom
解析：选D 考查非限制性定语从句。句意：这门关于中国饮食的课程每年都吸引100多个学生，其中一半是留学生。of表示“……的一部分”，关系代词whom指代100 students，在从句中作介词of的宾语。