– Why does she look so tired?
-- She all the morning and she still hasn’t finished it.
A. cleaned
B. was cleaning
C. has been cleaning
D. has cleaned
网友回答
A. cleaned
B. was cleaning
(答案→)C. has been cleaning
D. has cleaned
解析：clean这个动作，之前就发生了，一直到现在还没完成，还在继续，因此用现在完成进行时态。