题目内容

---When shall we start the reconstruction of the historic building?
--- Not until our program ______ by the authority.
A．will approveB．will be approved
C．has approvedD．has been approved
D
考查时态。句意：我们什么时候开始这个古建筑的重建？——直到我们的计划被当局批准后。可知下文描述的是在某个时间点前完成的动作，我们的计划是动作的对象，故用完成时态，被动语态，选D。
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