I have been an engineer for more than ten years,but I was once a worker for three years.这里was once a worker 为什么不是had been a worker?
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![I have been an engineer for more than ten years,but I was once a worker for three years.这里was once a worker 为什么不是had been a worker?](/uploads/image/z/8062262-62-2.jpg?t=I+have+been+an+engineer+for+more+than+ten+years%2Cbut+I+was+once+a+worker+for+three+years.%E8%BF%99%E9%87%8Cwas+once+a+worker+%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E6%98%AFhad+been+a+worker%3F)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 11:28:06