looked after
looked up
looked for
looked down
本题考查短语动词的辨析。look after“照看”;look up“查找;查阅(信息) ”;look for“寻找”;look down“向下看”。结合句中的map和make sure he was not lost可知是在地图中查找信息,故选B。 句意:这名游客查看地图,以确保他没有迷路。