请高手从语法上讲解为什么选D?8．The new highway in the area is reported _________D_______ within four years.A．completing B．to have completedC．having been completed D．to have been completed

请高手从语法上讲解为什么选D?8．The new highway in the area is reported _________D_______ within four years.A．completing B．to have completedC．having been completed D．to have been completed
请高手从语法上讲解为什么选D?
8．The new highway in the area is reported _________D_______ within four years.
A．completing B．to have completed
C．having been completed D．to have been completed

请高手从语法上讲解为什么选D?8．The new highway in the area is reported _________D_______ within four years.A．completing B．to have completedC．having been completed D．to have been completed
to have done 是将来完成时,本句的意思是highway将在未来4年之内完成,所以用将来完成时,
而highway是被完成,所以需要用被动语态,因此是要用 be done．
不过楼猪小气啊``居然不给悬赏..郁闷..下次还没有的话就不回答了~浪费口水``