来源：学生作业帮 编辑：搜狗做题网作业帮 分类：英语作业 时间：2024/07/09 17:52:12
一道英语题目~请帮个忙,谢谢
we____on it for several hours but we have not yet finished the work.
A.work B.are working C.have been working D.have been worked
选哪个?为什么.
对不起,我没分了
选择C
因为we have not yet finished the work 所以是过去的过去
排除A/B
又因为是持续的 所以选择C
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