12．一When shall we restart our business？
一Not until we       our plan．（　�。�
A．will finishB．are finishingC．are to finishD．have finished

分析 ---我們什么時候?qū)⒅匦麻_始我們的生意？
----直到我們完成我們的計劃，我們才重新開始我們的生意．

解答 答案D．本題主要考查動詞時態(tài)．在狀語從句中，經(jīng)常用一般現(xiàn)在時表將來時，用現(xiàn)在完成時表將來完成時．此處為 until 引導(dǎo)的時間狀語從句，故用現(xiàn)在完成時，選 D．

點評 時態(tài)題的考查關(guān)鍵是抓住句子的上下文含義和句中的時間狀語．要根據(jù)時間狀語來選擇合適的時態(tài)，在平時的學(xué)習(xí)中要注意積累有關(guān)時態(tài)的用法和各種時態(tài)的特殊之處．

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