【題目】There are 50 students in my class. Fifty percent of them from poor villages.
A.is
B.are
C.was
D.were

【答案】B
【解析】句意：我們班有50名學生，90%來自貧困的村莊。由are可知此處用一般現(xiàn)在時，排除CD；them指students，所以謂語動詞用復數(shù)，所以答案是B。

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