--Why?Charlie,your shoes are so dirty!--Mum,I_____in the garden downstairs
--Why?Charlie,your shoes are so dirty!
--Mum,I_____in the garden downstairs all the afternoon.
A.was working B.have been working
但我认为A妥当,关键他说话时还在不在干活呢?我觉得语境下他不在了啊
用过去进行时表示过去某一时段的动作啊。而且这里动作结束了啊 不会延续下去了