题目内容

Mr. Zhang ________ as an engineer since he came to the computer company in 2008.
A．worksB．workedC．has workedD．had worked
C

试题分析：句意：自从张先生在2008年来到这个电脑公司，他就是一名工程师了。分析考查固定句型：主句（运用现在完成时）+since+从句（一般过去时），主语是单数第三人称，因此助动词为has.故选C
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