The course normally attracts 20 students per year,of whose up tohalf will be from abroad.

问题描述:

The course normally attracts 20 students per year,of whose up tohalf will be from abroad.
为什么用of whose?
错了,是of whom

那门课程每学年通常会吸引二十名学生选修,他们中有一半是留学生.
whom 指代前一小句的宾语students,所以用宾格.他们中的,所以用of whom.
请及时采纳,多谢!