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4．Mr．Li _____as a physics teacher for ten years in our school，and now is Party secretary-general of our city．（　　）
A．worksB．workedC．had workedD．has worked

分析 李老師在我們學校做了十年的物理教師，現在是我市的黨委書記．

解答 答案：B
根據句意"…and now is Party secretary-general of our city…現在是我市的黨委書記"可知，李老師現在不是物理老師了，前面的句子表達的應該是他過去是物理老師，所以要使用一般過去時．故選B

點評 做本題時，要注意一般過去時與現在完成時的區別．一般過去時講的只是發生在過去的動作或狀態；而現在完成時表示發生在過去的動作或狀態，持續到了現在，也有可能延續到將來；強調的是對現在造成的影響或結果．

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