问题
选择题
In that school, English is compulsory for all students, but French and Russian are _____. [ ]
A. special
B. regional
C. optional
D. original
答案
答案：C
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In that school, English is compulsory for all students, but French and Russian are _____. [ ]
A. special
B. regional
C. optional
D. original
答案：C