—Your colleague is speaking English with fluency.    
—It's no wonder．She ____ in the UK for a year as a visiting professor．
A．workedB．has workedC．had workedD．has been working
A

試題分析：句意：--你的同事英語說得很流利。--難怪（她說英語流利）。她作為訪問教授在英國工作過一年。在英國工作一年是過去發(fā)生的事情，跟現(xiàn)在無關(guān)，排除B、D。題中不存在“過去的過去”，排除C。work是延續(xù)性動(dòng)詞，可以跟for a year連用。故A正確。
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