Mr. Daniel is now in our school, but he once in NO. 1 Middle School for three years.A. works B. workedC. had worked D. has worked 题目和参考答案——青夏教育精英家教网—

题目内容

Mr. Daniel is now in our school, but he once __ in NO. 1 Middle School for three years.

A. works B. worked

C. had worked D. has worked

【解析】

试题分析：考查一般过去时。一般过去时表示过去的动作或状态；现在完成时表示从过去持续到现在的动作或状态；过去完成时表示过去某时之前结束的动作或状态。句意：丹尼尔先生现在在我们学校，但是他曾经在第一中学呆了三年。没有时间的延续，没有过去某时之前结束的动作或状态，排除C,D，A.是一般现在时，句子中的once，曾经暗示一个过去的时间，故选B。

考点：考查一般过去时

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