单选题 About 85 percent of the students______ good, and part of them______ interested in biology.

【正确答案】 B
【答案解析】[解题指要] 20 percent, the rest, two thirds, half, all等词修饰的名词如果为单数，则动词用单数，如果名词为复数，则动词也与其保持一致，用复数。