The little boy is dirty from head to foot because he______in the mud all morning.<br />A. has played <br>B. is playing <br>C. has been playing <br>D. was playing

The little boy is dirty from head to foot because he______in the mud all morning.
A. has played
B. is playing
C. has been playing
D. was playing

出自：国家开放大学英语语法

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