—Your colleague is speaking English with fluency.—It's no wonderShe in the UK for a year

—Your colleague is speaking English with fluency.
—It's no wonder．She in the UK for a year as a visiting professor．
A. worked
B. has worked
C. had worked
D. has been working

(答案→)A. workedB. has workedC. had workedD. has been working解析：句意：--你的同事英语说得很流利。--难怪（她说英语流利）。她作为访问教授在英国工作过一年。在英国工作一年是过去发生的事情，跟现在无关，排除B、D。题中不存在“过去的过去”，排除C。work是延续性动词，可以跟for a year连用。故A正确。

对的，就是这个意思

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