remaining to be repaired
remained to be repaired
remaining to repair
remained to repair
本题考查非谓语动词。此处是分词短语作后置定语,remain与equipment之间为主动关系,故应用现在分词形式;equipment是被修理,故应用to be repaired。综上所述可知答案为A。
句意:由于还有大量设备需要修理,老板要求员工加班。