All classes of this school are with modern .
A. equipped; equipment
B. equipped; equipments
C. equipping; equipments
D. equipping; equipment
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(答案→)A. equipped; equipment
B. equipped; equipments
C. equipping; equipments
D. equipping; equipment
解析:equipme…… with 用……装备……,equipment名词装备的意思,这些班级是被装备的对象,用被动语态,故选A。