---I have finished my homework already, mum.
--- When ________ you ________ it?
A．did; finishedB．did; finish
C．have ; finishedD．were; finishing
B

試題分析：句意：媽媽，我已經(jīng)完成了我的作業(yè)。你什么時候做完的？答語中只是詢問過去的某個動作什么時候完成的，所以一般過去時，故選B
點評：動詞的時態(tài)是學(xué)習(xí)英語過程中非常重要的知識。而很多的題目，要通過上下文的語境判斷得知時態(tài)。一般過去時，表示過去發(fā)生的動作，是最基本的時態(tài)，句中往往有yesterday,just now,ago等明確的時間狀語，本題不難，平時加強(qiáng)記憶，理解即可。
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