---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
考查時態(tài)。句意：我們什么時候開始這個古建筑的重建？——直到我們的計劃被當局批準后。可知下文描述的是在某個時間點前完成的動作，我們的計劃是動作的對象，故用完成時態(tài)，被動語態(tài)，選D。
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