two thirds of the class ___ from other countries A.is B.are

two thirds of the class ___ from other countries A.is B.are
two thirds of the class ___ from other countries A.is B.are

two thirds of the class ___ from other countries A.is B.are
B
主语是复数,所以用are
班里三分之二的学生来自于其它国家
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B

B

选A。