The construction of the laboratory_by the end of the year.a.will complete b.will have completed
问题描述：
The construction of the laboratory_by the end of the year.a.will complete b.will have completed
c.will have been comlpleted d.will be completed
答
B.图书馆的建设到年底将会完成.by the end of the year 与完成时连用,又因为指将来的时间,用将来完成时,与主语被动关系所以用将来完成时的被动语态：will +have + 动词的过去分词可是答案是C非常不好意思，就是C。敲错了，看我的解释就行。