问题
选择题
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
答案
答案：A
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。