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问题: 时态选择题

he ( )there for a few months and then went to America,填worked 还是has been working,帮忙解决,谢谢

解答:

worked
即使用完成时,也应该用had been working 因为这件事情显然发生在went to America 之前
不过这里表示完成的动作,所以用worked就行