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(xiàn)在是我市的黨委書記．

解答 答案：B
根據(jù)句意"…and now is Party secretary-general of our city…現(xiàn)在是我市的黨委書記"可知，李老師現(xiàn)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(xiàn)在完成時的區(qū)別．一般過去時講的只是發(fā)生在過去的動作或狀態(tài)；而現(xiàn)在完成時表示發(fā)生在過去的動作或狀態(tài)，持續(xù)到了現(xiàn)在，也有可能延續(xù)到將來；強調(diào)的是對現(xiàn)在造成的影響或結(jié)果．

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