4．The hostess of the party，who__________ as a doctor for five years，is president of a famous private school．（　�。�
A．workedB．has workedC．worksD．had worked

分析 今天聚會的女主人曾經(jīng)當(dāng)過五年醫(yī)生，現(xiàn)在是一所很出名的私立學(xué)校的校長．

解答 答案：A
該題考查一般過去時的運(yùn)用，根據(jù)句意可知，女主人現(xiàn)在的職業(yè)是一所私立學(xué)校的校長，那么as a doctor for five years"當(dāng)過五年醫(yī)生"則為女主人以前的經(jīng)歷，為發(fā)生在過去的事情，所以應(yīng)用一般過去時，該題最大干擾項(xiàng)為B選項(xiàng)現(xiàn)在完成時，但是現(xiàn)在完成時表示動作發(fā)生在過去對現(xiàn)在造成一定影響（題中未提及）或動作發(fā)生在過去且還有可能延續(xù)下去（當(dāng)醫(yī)生的經(jīng)歷已結(jié)束），兩項(xiàng)均不符合，所以不能用現(xiàn)在完成時，故選A．

點(diǎn)評 考查時態(tài)時，要注意句中表示時間的成分對時態(tài)的提示，如果沒有明確的時間提示，則可以通過句中邏輯關(guān)系來確定時態(tài)．

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