The little boy is dirty from head to foot because he ___ in the mud all morning.

题型：不详难度：来源：

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

答案

C

解析

考查时态。根据时间状语all morning说明是指在过去一段时间里一直发生的事情，故使用现在完成进行时，表示动作的持续性和反复性。句意：这个小男孩从头到脚都是脏的，因为整个早晨他都在淤泥里玩耍。故C正确。