The course normally attracts 20 students per year up to half will be from abroad. A. in

问题补充：

The course normally attracts 20 students per year, up to half will be from abroad.

A. in which

B. for whom

C. with which

D. of whom

答案：

A. in which

B. for whom

C. with which

(答案→)D. of whom

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