单选题 A year ago there were slightly more______than jobseekers, but now there are twice as many openings.
【正确答案】 B
【答案解析】该句意为：一年前，空缺岗位略多于求职者，现在空缺岗位翻了一番。vacuum：真空；vacancy：空缺，空位；vacation：假期；vocation：职业。