问题
选择题
4．My hands are dirty. I ______ the wall the whole morning but haven’t finished yet.
A．have painted
B．have been painting
C．am painting
D．Painted
答案
答案：B
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4．My hands are dirty. I ______ the wall the whole morning but haven’t finished yet.
A．have painted
B．have been painting
C．am painting
D．Painted
答案：B