根据第四段I stayed for 30 minutes on the top of the mountain and took some pictures and left a picture of my dog——Pacu,(我在山顶呆了30分钟,拍了一些照片,留下了我的狗——帕库的照片,)可知,他在山顶呆了30分钟。故填30 minutes. (4)推理判断题。根据第三段And he said it was a ...
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