---How long have you been in the room?---Just a few minutes. My cousins ________ home together with me.A.have walkedB.had walkedC.walkedD.have been walking
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C解析句意：--你在房间里已经待了多久了？--刚刚几分钟。我的表兄们陪我走回家的。根据答语Just a few minutes=I have just been in the room (for) a few minutes.可知说话人此刻正呆在房间里，因此“走回家”这一动作发生在现在之前，应使用一般过去时态。