She ____ the house the whole morning but it seems to be at least an hour before she finishes it.
A．has been cleaningB．cleanedC．had cleanedD．has cleaned
A
考察時態(tài)，根據(jù)the whole morning可知，該句表示一直在干某事，所以選擇完成進行時
句意為她一個早上都在打掃房間，但是看起來至少還有一個小時她才能結(jié)束。
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