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How long has that factory been ____ It's been open ____ several years.选项下面A opening,for B opened,since C opened for D open,since 为什么选D?
题目详情
How long has that factory been ____ It's been open ____ several years.选项下面
A opening,for B opened,since C opened for D open,since 为什么选D?
A opening,for B opened,since C opened for D open,since 为什么选D?
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答案和解析
因为open作动词讲的时候是非延续性动词,在现在完成时中的动词有选择性,多用延续性的open就要改为be open ,open的形容词还是Open,所以选D
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