【題目】The number of the volunteers in our city 2,000. And sixty percent of them teachers and students.
A.is; is
B.is; are
C.are; is
D.are; are

【答案】B
【解析】the number of……，作主語時(shí)，謂語動(dòng)詞用單數(shù)；sixty percent of……“百分之六十……”，當(dāng)其修飾的名詞在句子中作主語時(shí)，謂語動(dòng)同用單數(shù)還是復(fù)數(shù)取決于名詞，即與名詞保持一致．因?yàn)閛f后跟代詞them．所以答案為B。

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