【題目】My uncle ___________as a doctor since he came back from America five years ago.

A.workedB.has workedC.will work

【答案】B

【解析】

句意:我的叔叔自從五年前從美國(guó)回來(lái),就一直任職為一名醫(yī)生。

考查現(xiàn)在完成時(shí)。worked工作;has worked工作了;will work將要工作。分析句子結(jié)構(gòu)并由關(guān)鍵詞since可知,此處是since+過(guò)去時(shí)間點(diǎn)five years ago,應(yīng)用現(xiàn)在完成時(shí),結(jié)構(gòu)為have/has+動(dòng)詞過(guò)去分詞。故選B。

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