一Whenshallwestarttherestorationofthehistoricbuildings?一Notuntilourplan_

一When shall we start the restoration of the historic buildings?一Not until our plan________ by the committee.A.will be approvedB.approvesC.is to approveD.has been approved

D解析试题分析：until连接的是时间状语从句，不能用将来时故排除A；又因为plan与approve之间是被动关系。故选D.考点：考查动词的时态和语态的用法。点评：动词的时态和语态放在一起考查增加了试题的难度，需要考生有分析理解复杂的句子结构的能力。即学即练：—Tony, come down and help me with the heavy box! — Come on! I _______ all day long．Get Peter to do that! A．work B．had been workingC．had worked D．have been working解析：D。考查时态。根据关键词all day long可知使用现在完成进行时，现在完成进行时表示动作的持续性和延续性。句意：—Toney，来帮我搬这个重盒子。—算了吧！我一整天都在上班。让Peter做吧。故D正确。

谢谢解答