She ____ the house the whole morning but it seems to be at least an hour before
题型：不详难度：来源：
She ____ the house the whole morning but it seems to be at least an hour before she finishes it.| A．has been cleaning | B．cleaned | C．had cleaned | D．has cleaned |
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答案
| A |
解析
考察时态，根据the whole morning可知，该句表示一直在干某事，所以选择完成进行时
句意为她一个早上都在打扫房间，但是看起来至少还有一个小时她才能结束。 |
举一反三
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