In that school English is compulsory for all students but French and Russian are . A. sp

问题补充：

In that school, English is compulsory for all students, but French and Russian are .

A. special

B. regional

C. optional

D. original

答案：

A. special

B. regional

(答案→)C. optional

D. original

解析：，A特别的，专门的Ｂ地区的，局部的Ｃ任选的，非强制性的Ｄ最初的，原来的。句意，在那所学校，英语是所有学生必修的，但法语和俄语是选修的。故选Ｃ

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