第10题: [单项选择]Geologists suggested that the region might in fact be more susceptible to earthquakes than ______. A. previously been believed B. it had previously believed C. did it previously believe D. had previously been believed 参考答案:D 答案解析:句意:地质学家表明,该地或许比之前所想象的更易发生地震。than前后表示同一事物的比较,因此than之后的主语it(指代“the region”)可省。因其与believe为被动关系,排除B项和C项。